Crystal Exporting Problem

I have a crystal report that is takes 3 hours when I call the ExportToStream function in c#; I am exporting a pdf document. When I perform the export in Crystal it takes only a minute. So the fact that this is taking 3 hours when called in c# is certainly a crystal bug. I have tried running this in the main thread and a seperate thread; I have also tried setting the thread priority to highest but it makes no difference. This project is simple.. fix the problem..