I am trying to fill out a pdf form that other users CAN fill out. I have reader 9 and am working on a windows vista computer. The file was downloaded through earthlink. I accessed the file directly from the original web site and also have a copy that was partially filled in by someone else and forwarded to me. Neither is editible, even the text added by the previous user. This is not the only pdf form I have trouble with. My husband also cannot edit the files on his mac. Any ideas?