Reinstalled my Corel X5 and now I can't open any file! (not importable using the selected filter...)

I just had to change my computer so I downloaded Corel X5 again.

Now I'm trying to open my saved work (using the same Corel X5) and can't open ANY file!!!

"xxxxx.cdr is not importable using the selected filter, or this format is not supported"

Somebody help please!!