Error in Universal Worklist - Tasks

Hi,

I have done all the configurations required for the Universal worklist to work. But whenever I try to create a new standard task(non-workflow) and click on 'save', I get the error message: "Error during process. Contact your system administrator."

Current version of the portal is:

6.0.2.5.4_ContentManagement_Collaboration

6.0.2.5.0.Enterprise_Portal_Service_Pack_2

Does anyone out there know what could be the reason for this? Any help would be appreciated.

Thanks

Shakeel