diff --git a/lam/lib/baseModule.inc b/lam/lib/baseModule.inc
index 378afc29..71fbfb6c 100644
--- a/lam/lib/baseModule.inc
+++ b/lam/lib/baseModule.inc
@@ -57,11 +57,12 @@ class baseModule {
 	/** contains all ldap attributes which are loaded from ldap */
 	var $orig;
 
-	/** contains the last error messages of the module.
-	* Ths variable is needed because we don't want to make
-	* unnecesarry checks when a attributes wasn't changed */
+	/** contains all error messages wich were troggered*/
 	var $errors;
 	
+	/** contains all error messages of a module */
+	var $errormessages;
+
 	/**
 	* Creates a new base module class
 	*
@@ -80,6 +81,8 @@ class baseModule {
 	*/
 	function init($base) {
 		$this->base = $base;
+		// load error messages
+		$this->loadErrorMessages();
 		// Create Arrays with ldap attributes
 		$this->attributes =& $_SESSION[$this->base]->get_module_attributes(get_class($this));
 		$this->orig =& $_SESSION[$this->base]->get_module_attributes(get_class($this), true);
@@ -97,6 +100,7 @@ class baseModule {
 	*/
 	function load_ldap_attributes($attr) {
 		// Load attributes which are displayed
+		$objectClassName = $this->attributes['objectClass'];
 		// unset count entries
 		unset ($attr['count']);
 		$attributes = array_keys($attr);
@@ -114,6 +118,10 @@ class baseModule {
 				}
 			}
 		}
+		$this->attributes['objectClass'] = $objectClassName;
+		if (in_array($objectClassName[0], $attr['objectClass']))
+			$this->orig['objectClass'] = $objectClassName;
+		else $this->orig['objectClass'] = array();
 	}
 
 	/**
@@ -134,6 +142,11 @@ class baseModule {
 		return $this->scope;
 	}
 
+	/**
+	* This function is needed to avoid error messages */
+	function loadErrorMessages() {
+	}
+	
 	/**
 	* Returns true if this module fits for the current scope.
 	*
diff --git a/lam/lib/modules/posixGroup.inc b/lam/lib/modules/posixGroup.inc
index 62d2c916..65f9bf4b 100644
--- a/lam/lib/modules/posixGroup.inc
+++ b/lam/lib/modules/posixGroup.inc
@@ -35,6 +35,23 @@ class posixGroup extends baseModule {
 		parent::baseModule($scope);
 	}
 
+	/** this functin fills the error message array with messages
+	**/
+	function loadErrorMessages() {
+		//$this->errormessages['minGID'][0] = array('ERROR', _('Minimum GID number'), _('Minimum GID number is invalid or empty!'));
+		//$this->errormessages['maxGID'][0] = array('ERROR', _('Maximum GID number'), _('Maximum GID number is invalid or empty!'));
+		//$this->errormessages['cmpGID'][1] = array('ERROR', _('Maximum GID number'), _('Maximum GID number must be greater than minimum GID number!'));
+		$this->errormessages['userPassword'][0] = array('ERROR', _('Password'), _('Please enter the same password in both password-fields.'));
+		$this->errormessages['userPassword'][1] = array('ERROR', _('Password'), _('Password contains invalid characters. Valid characters are: a-z, A-Z, 0-9 and #*,.;:_-+!$%&/|?{[()]}= !'));
+		$this->errormessages['gidNumber'][0] = array('INFO', _('GID number'), _('GID number has changed. Please select checkbox to change GID number of users and hosts.'));
+		$this->errormessages['gidNumber'][2] = array('WARN', _('ID-Number'), _('It is possible that this ID-number is reused. This can cause several problems because files with old permissions might still exist. To avoid this warning set maxUID to a higher value.'));
+		$this->errormessages['gidNumber'][3] = array('ERROR', _('ID-Number'), _('No free ID-Number!'));
+		$this->errormessages['gidNumber'][4] = array('ERROR', _('ID-Number'), _('ID is already in use'));
+		$this->errormessages['cn'][0] = array('WARN', _('Groupname'), _('You are using a capital letters. This can cause problems because windows isn\'t case-sensitive.'));
+		$this->errormessages['cn'][1] = array('WARN', _('Groupname'), _('Groupname in use. Selected next free groupname.'));
+		$this->errormessages['cn'][2] = array('ERROR', _('Groupname'), _('Groupname contains invalid characters. Valid characters are: a-z, A-Z, 0-9 and .-_ !'));
+		} 
+	
 	/**
 	* Returns meta data that is interpreted by parent class
 	*
@@ -347,8 +364,6 @@ class posixGroup extends baseModule {
 	/* Write variables into object and do some regexp checks
 	*/
 	function proccess_attributes($post, $profile=false) {
-		if ($this->orig['gidNumber'][0]!='' && $post['gidNumber']!=$this->attributes['gidNumber'][0])
-		$errors['gidNumber'][] = array('INFO', _('GID number'), _('GID number has changed. Please select checkbox to change GID number of users and hosts.'));
 		// Load attributes
 		$this->attributes['description'][0] = $post['description'];
 		if ($post['userPassword_no']) $this->userPassword_no=true;
@@ -360,12 +375,12 @@ class posixGroup extends baseModule {
 			else $this->changegids=false;
 			if (isset($post['userPassword'])) {
 				if ($post['userPassword'] != $post['userPassword2']) {
-					$errors['userPassword'][] = array('ERROR', _('Password'), _('Please enter the same password in both password-fields.'));
+					$errors['userPassword'][] = $this->errormessages['userPassword'][0];
 					unset ($post['userPassword2']);
 				}
 				else $this->userPassword($post['userPassword']);
 				if (!ereg('^([a-z]|[A-Z]|[0-9]|[\|]|[\#]|[\*]|[\,]|[\.]|[\;]|[\:]|[\_]|[\-]|[\+]|[\!]|[\%]|[\&]|[\/]|[\?]|[\{]|[\[]|[\(]|[\)]|[\]]|[\}])*$', $this->userPassword()))
-				$errors['userPassword'][] = array('ERROR', _('Password'), _('Password contains invalid characters. Valid characters are: a-z, A-Z, 0-9 and #*,.;:_-+!$%&/|?{[()]}= !'));
+				$errors['userPassword'][] = $this->errormessages['userPassword'][1];
 			}
 			if ($post['genpass']) $this->userPassword(genpasswd());
 			if ($this->attributes['gidNumber'][0]!=$post['gidNumber'] || ($this->errors['gidNumber'][0]='ERROR')) {
@@ -398,10 +413,10 @@ class posixGroup extends baseModule {
 							$i = intval($minID);
 							while (in_array($i, $gids)) $i++;
 							if ($i>$maxID)
-							$errors['gidNumber'][] = array('ERROR', _('ID-Number'), _('No free ID-Number!'));
+							$errors['gidNumber'][] = $this->errormessages['gidNumber'][3];
 							else {
 								$this->attributes['gidNumber'][0] = $i;
-								$errors['gidNumber'][] = array('WARN', _('ID-Number'), _('It is possible that this ID-number is reused. This can cause several problems because files with old permissions might still exist. To avoid this warning set maxUID to a higher value.'));
+								$errors['gidNumber'][] = $this->errormessages['gidNumber'][2];
 							}
 						}
 						else $this->attributes['gidNumber'][0] = $minID;
@@ -420,7 +435,7 @@ class posixGroup extends baseModule {
 						if ((in_array($this->attributes['gidNumber'][0], $gids)) && $this->orig['gidNumber'][0]=='') $errors['gidNumber'][] = array('ERROR', _('ID-Number'), _('ID is already in use'));
 						// id-number is in use, account is existing account and id-number is not used by itself
 						if ((in_array($this->attributes['gidNumber'][0], $gids)) && $this->orig['gidNumber'][0]!='' && ($this->orig['gidNumber'][0] != $this->attributes['gidNumber'][0]) ) {
-							$errors['gidNumber'][] = array('ERROR', _('ID-Number'), _('ID is already in use'));
+							$errors['gidNumber'][] = $this->errormessages['gidNumber'][4];
 							$this->attributes['gidNumber'][0] = $this->orig['gidNumber'][0];
 						}
 					}
@@ -429,10 +444,10 @@ class posixGroup extends baseModule {
 			if ($this->attributes['cn'][0]!=$post['cn'] || ($this->errors['cn'][0]='ERROR')) {
 				$this->attributes['cn'][0] = $post['cn'];
 				if (($this->attributes['cn'][0] != $post['cn']) &&  ereg('[A-Z]$', $post['cn']))
-				$errors['cn'][] = array('WARN', _('Groupname'), _('You are using a capital letters. This can cause problems because windows isn\'t case-sensitive.'));
+				$errors['cn'][] = $this->errormessages['cn'][0];
 				// Check if Groupname contains only valid characters
 				if ( !ereg('^([a-z]|[A-Z]|[0-9]|[.]|[-]|[_])+$', $this->attributes['cn'][0]))
-				$errors['cn'][] = array('ERROR', _('Groupname'), _('Groupname contains invalid characters. Valid characters are: a-z, A-Z, 0-9 and .-_ !'));
+				$errors['cn'][] = $this->errormessages['cn'][2];
 				// Create automatic useraccount with number if original user already exists
 				// Reset name to original name if new name is in use
 				// Set username back to original name if new username is in use
@@ -472,8 +487,11 @@ class posixGroup extends baseModule {
 				}
 				// Show warning if lam has changed username
 				if ($this->attributes['cn'][0] != $post['cn']) {
-					$errors['cn'][] = array('WARN', _('Groupname'), _('Groupname in use. Selected next free groupname.'));
+					$errors['cn'][] = $this->errormessages['cn'][0];
 				}
+			// show info when gidnumber has changed
+			if (($this->orig['gidNumber'][0]!=$this->attributes['gidNumber'][0]) && $this->orig['gidNumber'][0]!='' && $post['gidNumber']!=$this->attributes['gidNumber'][0])
+			$errors['gidNumber'][] = $this->errormessages['gidNumber'][0];
 			}
 		}
 		// Return error-messages