Hi Kamesh,
This looks like secure store is not updated post system refresh. Check RFC of server in internal connections RFCs (SM59) and see if it is working fine.
This is known issue, raised several times and solution is available on SCN.
Please check below threads:
http://scn.sap.com/thread/3152139
http://scn.sap.com/thread/91872
Cheers !!!
Ashish