Getting cognos issue like this

[nagoole]

Hi All,

We are getting issues in cognos 10.1 v like this

2:22:07 PM EST: Content Manager encountered fatal error while accessing a security system.
2:22:17 PM EST: Dispatcher acknowledged the error.
2:24:21 PM EST: Dispatcher started negotiation process to determine which Content Manager instance should become active.
2:26:26 PM EST: Cognos Report Services crashed
2:26:26 PM EST: Cognos BI Bus (Unix PID 15859) generated fatal error and crashed.

we couldnt find what was the issue, this is related security issue ....? please help on this.

Thanks,
Naga