--- a/telephonyserverplugins/common_tsy/commontsy/src/mmstorage/cmmonstoretsy.cpp	Tue Jul 06 15:36:38 2010 +0300
+++ b/telephonyserverplugins/common_tsy/commontsy/src/mmstorage/cmmonstoretsy.cpp	Wed Aug 18 10:57:47 2010 +0300
@@ -110,6 +110,7 @@
         {
         // deregister tsy object from message manager
         iMmPhone->MessageManager()->DeregisterTsyObject(this);
+		iMmPhone->SetONStoreTsy(NULL);
         }
 
     if ( NULL != iTsyReqHandleStore )