If you are using SolidWorks Enterprise PDM 2012 SP 4.0, (If I remember correctly), this was identified as bug.
Check with your VAR for the hotfix.
Apply that hotfix and that should resolve the problem
Hope his helps !
Message was edited by: Raghavendra Bhagwan
I checked through the Knowledge Base and found S-061593 which has a hotfix for the issue.