Failed to open document

The file i made with macromedia flash mx pro 2004, cant be opened in macromedia flash MX 2004??? WHY???

if i try to open the fla file, flash screams “failed to open document”…

now i have to make the entire fla file again? and if i do a format c:, i have to make it again, and again, and again???
what is this…?

plz help me out here if you know a way out of this mess!