Excel 2003 hyperlink to PDF problem

Hello,

I am having an issue between Excel 2003 and Adobe Acrobat Pro 7 on a Windows XP pro machine.

When I click on a hyperlink inside an Excel spreadsheet, it is linked to a PDF file. When clicked, the screen flashes the Adobe Acrobat program for a split second and then disappears.

I have gone into folder options and switched the PDF to open with Adobe reader 8, but that does nothing.

Any ideas of how to get the PDF to open and stay open would be most appreciated.

Thanks