PDFsharp & MigraDoc Foundation

Thank you for the great program. I've using it in my graduation project.
It works like a charm. Anyway i've one problem with Adobe Acrobat Reader's Version.
My instructure's computer install Acrobat Reader 5 and he can't open my PDF. Eventhough it can be open in my Computer which using Foxit Reader.
Any recommendation regard this problem? Is there any setting that can used to fix this problem?

Thank you in advance
Best Regards,
Jeng

I have no problems opening our PDF files with Acrobat 4, 5, 6, 7, or 8.
PDF version 1.4 (for Acrobat 5) is the default.

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Regards
Thomas Hoevel
PDFsharp Team