Error opening crystal report in excel format

We have an application written in VB.NET 2003 which has built in Crystal reports. When we install the application on Windows 2008 server we get the following error while trying to open crystal report in excel format Error is : Error in File :"....rpt" Error detected by export DLL. The report opens up fine in PDF on server

Opeing report in Excel works fine on my local(development) machine...But this error is thrown on server开发者_如何学Go...

Kindly help me resolve this issue and how to fix it?..

You have to download the patch crnet11win from businessobjects.com