please insert Expansion CD

[Tal]

This was posted last week - don't know if it is pertinent to you or not:

Does rebooting create a problem where the computer can no longer read the CD?
Diablo II and Warcraft III Users:

Many customers have reported they could play the game, but after rebooting their machines, they received the "Please verify your CD is in the drive" error message. After reinstalling the game they could play but rebooting would create the problem all over again. You should not have to reinstall the game every time you want to play.

We have found a couple of programs that may be creating this problem. These programs include Kazaa and Kazaa Lite.

If you are experiencing this type of problem, please try uninstalling Kazaa, uninstall the game, reinstall the game, and then patch the game. Please note that removing Kazaa alone will not fix the problem - you need to reinstall the game after removing Kazaa. This solution may not work for everyone, but we have received many reports confirming this has helped