IE will Close after login to SD+

IE will Close after login to SD+

Hi ;
After upgrading to SD+ 5.5 now users encounter a problem. After login to SD+ when it's going to show main program , suddenly a close alert appear on screen that shows a error and wants to send error to Microsoft.
When we use prior versions we have not such problem.
does SD+ 5 uses special security or Activex settings?
Our clinets use Windows XP SP1 & SP2 with some group policy settings.
Some other clients that use Wind2003 get such error.
When i installed Mozilla as web browser there is not any problem.
Please Help me

Thanks
Shahab









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