View word/excel documents in ITS

Hi,

Have any of you come across the following...

In transactions like FBV3, we can attach word/excel documents with a sap document. We can then view these documents. When I try to view the attached documents through Portal and ITS, I get a 'Select Program' dialog box from windows. I then have to find and select 'excel.exe' or 'word.exe' from program files for the attachment to open. Is there anyway to avoid the windows dialog ...

Thanks,

Smitha