I am having the same problem with mine. But when I put in the disk I here the computer spinning the disk and the I click on diablo 2 and then a pop up comes and says" insert expansion disk ". Even thought the disk is in and it is the expansion disk. I'm kind of confused on what is going on! Is it that my
Cdrom is bad? Because my brother plays star-craft and that does not work eater... can anyone help

The drive might be at it's end. Is the expansion disk scratched?