Index: branches/unlabeled/unlabeled-1.34.2/core/kernel/event_manager.php
===================================================================
diff -u -r4847 -r5428
--- branches/unlabeled/unlabeled-1.34.2/core/kernel/event_manager.php	(.../event_manager.php)	(revision 4847)
+++ branches/unlabeled/unlabeled-1.34.2/core/kernel/event_manager.php	(.../event_manager.php)	(revision 5428)
@@ -334,10 +334,9 @@
 
 		function registerHook($hookto_prefix, $hookto_special, $hookto_event, $mode, $do_prefix, $do_special, $do_event, $conditional)
 		{
-			if( !$this->Application->getUnitOptions($hookto_prefix) )
+			if( !$this->Application->prefixRegistred($hookto_prefix) )
 			{
-				if($this->Application->isDebugMode())
-				{
+				if ($this->Application->isDebugMode()) {
 					trigger_error('Prefix <b>'.$hookto_prefix.'</b> doesn\'t exist when trying to hook from <b>'.$do_prefix.':'.$do_event.'</b>', E_USER_WARNING);
 				}
 				return;