Empire at War: Forces of Corruption won't play

[Lulian]

This is an interesting change. Not too long ago, I bought a replacement Star Wars: Empire at War disk to replace my former game, which I gave to a friend as a present. I've bought Forces of Corruption on the day it was released, and has worked fine before.

 

Now that I have Empire at War on my computer again, I run up Forces of Corruption so I may play it, the expansion. The installation goes well. The game updates Empire at War for me, which is required. When it is finished, I restart my computer. Computer is finished rebooting, I attempt to play Forces of Corruption; After a few moments of the game attempting to read the disk, I get this.

 

" SWEAW FOC: Original disk could not be found or authenticated. "

 

Original disk? This is the original disk. Cannot be found? Maybe it is damaged?

 

Thanks in advance.