HELP, Acrobat 9 missing files, won't create new PDF & won't repair

PLEASE HELP! I tried to create a PDF in Acrobat 9 from a Word 2003 document & it won't let me. I've done this many times before & now all of a sudden it won't work. The import starts & then I get a message that it is missing "pdfmaker files". I tried to repair Acrobat using the "Repair Acrobat Installation" button, but nothing happened. I tried to use my disk but get a message that the "Patch Package could not be opened". I'm using Windows XP. Any help is appreciated.