Adobe v9 on W7 and office 2007. cannot create PDF from MS word using Adobe. But can from Excel, PPT

Adobe v9 on W7 and office 2007. cannot create PDF from MS word using Adobe. But can from Excel, PPT and other MS office apps. Reinslalled Adobe, updated Office, and Adobe no help! Also I can create a pdf from the MS Word and it is using the Adobe 9. So one would think that's good. No it isn't when you need to combine different files to one big PDF document. Any suggetions? Thank you