Hi Siva,
Now it would be good idea to upgrade boot code and firmware to the latest one:
firmware: 1.4.0.88
boot code: 1.3.5.06
to download:
http://software.cisco.com/download/release.html?mdfid=283019670&softwareid=282463181&release=1.4.0.88&relind=AVAILABLE&rellifecycle=&reltype=latest
for boot code upgrade:
http://sbkb.cisco.com/CiscoSB/ukp.aspx?vw=1&docid=f1e39061efb14c94a570bcbd6582167b_Firmware_Upgrade_Troubleshooting_on_300_and_500_Series_Manag.xml&pid=4&fcid=&fpid=&slnid=6
Regards,
Aleksandra