So, I have uploaded a file to a server and for some odd reason, when I download it again to the desktop it no longer opens nor can I open it in iTunes. A Quicktime window comes up saying, "This movie could not be opened. This file is not a movie file". Obviously it is not a movie file, so why does quicktime try to open it as one? The file extension is ".mp3", I can not see any other real reason why it would not open up, as it playes directly from the server.