Replying to Anybody that uses Premiere Pro CS3 I need help...

so ive been trying to make a small edit with avi files but completely randomly i will get an error that says something like "unsupported file type or damaged file" when i try to import the avi clips...  its totally random and not right because i know that the file type is supported (most of the other avi clips work) and none of the clips are damaged...  like i said totally random so its just a few files out of all of them that come up with the error. 

has anyone else had this problem?  what should i do to fix it?  ive heard a lot about how premiere pro doesnt like working with avi...  but thats the file type that the footy is in so I need a different solution.