Invalid controls

    // control Workflow 
    $class=get_class($this);
    $old=new $class($this->id);
    $fldType='id'.$class.'Type';
    debugLog("DHI",basename(__FILE__),__FUNCTION__,__LINE__);
    if ( property_exists($class, 'idStatus') and property_exists($class, $fldType) and $old->idStatus
      and (trim($old->idStatus)!=trim($this->idStatus) or trim($old->$fldType)!=trim($this->$fldType) ) 
      and $old->id and $class!='Document' and trim($old->idStatus) and trim($old->$fldType)) {
    	$type=new Type($this->$fldType);
    	$crit=array('idWorkflow'=>$type->idWorkflow,
    	            'idStatusFrom'=>$old->idStatus,
    	            'idStatusTo'=>$this->idStatus,
    	            'idProfile'=>$_SESSION['user']->idProfile);
    	$ws=SqlElement::getSingleSqlElementFromCriteria('WorkflowStatus', $crit);
    	if (!$ws or !$ws->id or $ws->allowed!=1) {
    		$oldStat=new Status($old->idStatus);
    		if (! $oldStat->isCopyStatus) {
    	    $result.="<br/>" . i18n("errorWorflow");
    		}
    	}
    }