I am working on a crystal report in a C# win app. There is a export button on the crystal report viewer which should prompt a dialog window and allow user to export the report displayed to different format. Unfortunately, while the report is displayed correctly, the application(actually the report viewer windows) freezed whenever I pressed that tiny export button on the top. I have downloaded a sample from the Business Object website and compare the 'references'+version, 'property' between my own app and the sample. I have no idea why the sample works fine and mine doesn't. Any clues?

FYI, here is the info of my app
- .Net 2003
- References included : (all 9.1.5 version)
CrystalDecisions.CrystalReports.Engine
CrystalDecisions.ReportSource
CrystalDecisions.Shared
CrystalDecisions.Windows.Forms
- report is generated by :
   one winform(A) pass parameters value to a form(B) that only holds a single crystalreportviewer, and then form(B) initiate the report(C.rpt) with the set of parameters. Data are pulled from a xsd(written dataset).

Is this problem .Net or CR related ? Any help or pointer is appreciated. Thanks.