Hi Aravind,
1.You have to delete queue from SMQ2 then u need to register the queue ,not deregister from SXMB_ADM.
2. Change the parameter in SXMB_ADM->Integration engine->Specific Configuaration->Select MONITOR->put Parameter
3.QRFC_RESTART_ALLOWED ,value is 1.
Also refer this blog on creating alerts for Q errors:
/people/santhosh.kumarv/blog/2009/05/19/sap-xipi-alerts-for-queue-errors
/people/sap.user72/blog/2005/11/29/xi-how-to-re-process-failed-xi-messages-automatically
Best Regards,
Monikandan
