Launching with backup CD

[Professor Lamme.]

ok this is the situation: my friend has (had, now idk if he has it anymore) kotor. he made me a backup of the game. it worked fine when i ran it on windows xp but now when i run it on vista i get this: "please instert the original disc instead of a backup"

 

I've seen more people play it on vista with a backup. what is the problem?

[Professor Lamme.]

can somebody help please? this error is getting annoying.

[Q]

Sorry, but I can't help you pirate the game.