now when i try to work on RAW files from my cameras,
Which Canon cameras exactly?
When you re-installed CS5, you probably reset Camera Raw to version 6.0 (the version which shipped with CS5).
Your cameras probably require a later version of Camera Raw, which may or may not be compatible with CS5.
I have two Canon's, an XTI and a T3. I had the same set up before. and it worked fine. Then wen the computer was redone, none of it works. I will check what version of Raw I have, but when I try to run updates on Adobe, that wont work either. Very frustrating. Thanks for the reply.