Error in Information Analyzer while executng Column analysis

[basav_ds]

Hi,

When i submit column analysis in Information Analyzer, it shows "Executing" status for some time and then it fails with the status "Error Encountered".
The error is:
"SorcererServiceLogging.java:-3 executeBaseProfile: Exception in process: Fail to create session for user [InformationAnalyzerSystemUser]: The maximum number of sessions has been reached."

I checked the no.of active sessions through 'Web Console for IBM Information Server', it is 2. Whereas the maximum allowed sessions is set to 1000. I couldn't see the cause for this error.

Your suggestions will be appreciated.