Hi Agamani,
You need to re-register the connector, restart uwl service and clear uwl cache after you make changes in xml file. Then test the behaviour.
http://help.sap.com/saphelp_nw70ehp2/helpdata/en/05/fe8ef669674991a4205666694b9c85/frameset.htm
http://help.sap.com/saphelp_nw70ehp2/helpdata/en/f5/bb8b518b0b471d89d7d282e77105fb/frameset.htm
Please let me know results.
Regards,
Rajendra