Index: trunk/core/kernel/session/session.php
===================================================================
diff -u -N -r1764 -r1852
--- trunk/core/kernel/session/session.php	(.../session.php)	(revision 1764)
+++ trunk/core/kernel/session/session.php	(.../session.php)	(revision 1852)
@@ -284,11 +284,15 @@
 		$this->Data =& new Params();
 		
 		$tmp_sid = $this->GetPassedSIDValue();
-		$expired_sids = $this->DeleteExpired();
-		if( ( $expired_sids && in_array($tmp_sid,$expired_sids) ) || ( $tmp_sid && !$this->Check() )  )
+
+		if( !defined('IS_INSTALL') && IS_INSTALL )
 		{
-			$this->SetSession();
-			$this->Application->HandleEvent($event, 'login:OnSessionExpire');
+			$expired_sids = $this->DeleteExpired();
+			if( ( $expired_sids && in_array($tmp_sid,$expired_sids) ) || ( $tmp_sid && !$this->Check() )  )
+			{
+				$this->SetSession();
+				$this->Application->HandleEvent($event, 'login:OnSessionExpire');
+			}
 		}
 		
 		if ($this->Check()) {