Thanks alexn for your guidance. Please see attached updatelog.txt file for your reference.
The contect if teh same is alos mentioned below, for your immeidat erefrence...
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4/16/2013 12:28:54 AM X220T\Ravi Starting task: AutoUpdate
4/16/2013 12:30:10 AM X220T\Ravi Checking update packages from repository NAIHttp.
4/16/2013 12:30:10 AM X220T\Ravi Initializing update...
4/16/2013 12:30:10 AM X220T\Ravi Downloading catalog.z.
4/16/2013 12:30:10 AM X220T\Ravi Verifying catalog.z.
4/16/2013 12:30:10 AM X220T\Ravi The requested file does not exist.
4/16/2013 12:30:10 AM X220T\Ravi The requested file does not exist.
4/16/2013 12:36:07 AM X220T\Ravi Starting task: AutoUpdate
4/16/2013 12:36:33 AM X220T\Ravi Starting task: AutoUpdate
4/16/2013 12:43:05 AM X220T\Ravi Starting task: AutoUpdate
4/16/2013 12:43:05 AM X220T\Ravi Task terminated: updater not ready
4/16/2013 12:46:01 AM X220T\Ravi Starting task: AutoUpdate
4/16/2013 12:46:42 AM X220T\Ravi Checking update packages from repository NAIHttp.
4/16/2013 12:46:42 AM X220T\Ravi Initializing update...
4/16/2013 12:46:42 AM X220T\Ravi Downloading catalog.z.
4/16/2013 12:46:42 AM X220T\Ravi Verifying catalog.z.
4/16/2013 12:46:42 AM X220T\Ravi The requested file does not exist.
4/16/2013 12:46:42 AM X220T\Ravi The requested file does not exist.
4/17/2013 5:16:53 PM X220T\Ravi Starting task: AutoUpdate
4/17/2013 5:17:11 PM X220T\Ravi Checking update packages from repository NAIHttp.
4/17/2013 5:17:11 PM X220T\Ravi Initializing update...
4/17/2013 5:17:11 PM X220T\Ravi Downloading catalog.z.
4/17/2013 5:17:11 PM X220T\Ravi Verifying catalog.z.
4/17/2013 5:17:11 PM X220T\Ravi The requested file does not exist.
4/17/2013 5:17:11 PM X220T\Ravi The requested file does not exist.
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