I'm getting the error suite product activation needed with Acrobat Pro

I own Adobe Creative Suite Design Premium CS5 and just this week Acrobat Pro started giving me the error suite product activation needed when I try to edit a document. I tried running Photoshop and that doesn't work.

Can anyone help me fix this?

Edit : I tried uninstalling Acrobat pro and reinstalling it and now it won't open at all.

Thank you

Derek