I keep getting a communication error while trying to burn.

I recently added a 2nd hard drive to the computer and for the cables to reach I had to switch them around. The cd writer is on the same ide cable as the primary hard drive. When I try to copy a cd or burn something from the primary hard drive nero gives me a "communication error" then it stops burning.

Anyone have any ideas? Everything is plugged in an functioning fine by itself. I have tried burning at lower speed but nothing has worked.

Thanks