game wont work

[jmaverick101]

ok i used to have the original dungeon siege, but it got scratched up beyond recognition. Luckily i had a made a back up. I tried using the back ups to install the game to another computer in my house and when it asks to insert the 2nd cd it doesnt recognize it and wont install the second cd. Does anyone know how to fix this. I've asked numerous places and all i get is stupid remarkes, so please leave those out.