Splinter Cell Chaos Theory Problem. Please help me!

[Mad_nv]

I have the Splinter Cell Chaos Theory copied version but I can't start it. I downloaded a mini image from this site but I still can't run it because the game asks for a serial number. I downloaded a number from another site and I typed it in the protection window but the game checks the serial number and tells me the number doesn't match to the CDs(mini image) serial. Can it be a problem when I first started the game I used the "original disc" when it installed the protection system and just after that I used the mini image. So I don't know wat should I do, the game has a great protection. Please help me if you can!
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