--- a/telephonyserverplugins/common_tsy/commontsy/src/mmstorage/cmmonstoretsy.cpp	Thu Jul 15 19:58:53 2010 +0300
+++ b/telephonyserverplugins/common_tsy/commontsy/src/mmstorage/cmmonstoretsy.cpp	Thu Aug 19 11:03:36 2010 +0300
@@ -104,6 +104,7 @@
         {
         // deregister tsy object from message manager
         iMmPhone->MessageManager()->DeregisterTsyObject(this);
+		iMmPhone->SetONStoreTsy(NULL);
         }
 
     if ( NULL != iTsyReqHandleStore )