ProcessStartInfo and Microsoft Office Document Imaging

[Stedak]

My application seems to freeze when Microsoft Office Document Imaging is set
as the default for loading images. If the Windows Picture and Fax Viewer is
used there is no problem. When I set a break point then the Document Imaging
will appear after I restart the application or if I just kill the app it
appears. I am working with TIF's.
Any thoughts as to what I need to do to enable the use of Microsoft Office
Document Imaging? If I eliminate the WaitForExit() call then it seems to work
fine.

Pretty simple code:

ProcessStartInfo startinfo = new ProcessStartInfo("C:\\MyTiff.tif");
Process process = Process.Start(startinfo);
process.WaitForExit();

Thanks!