I installed Adobe Acrobat Pro 9.0 several months ago and have printed from it several times in the past several months. Today it stopped printing. Every time I try to print, it saves to a .pm file instead. I am able to print from MS word and other programs, so it isn't my printer. I have tried several pdf files, so this isn't a single pdf file issue. I am running Vista and haven't changed this either. Any suggestions would be helpful. Thanks.