I try to create a PDF on the fly by, my language is c#.

The application works fine on the asp-net development server, when I tried  to release it on IIS, I got  an error concerning the authorisation. I tried to correct the error by changing the authorisations on PDFCreator.clsPDFCreator and PDFCreator.clsTools. Then the PDFCreator startet to work without errormessage, but he didn't create neither PDFs nor timeouts.  The application gets stuck at   _PDFCreator.cPrintURL(filePath,0);

Any ideas to solve my problem?