Loading but never ending

[Atrovent]

Hi!

I just purchased CivIV, installed it without error, then started it. It reached the "Loading" screen, waited for about a minute or two, the produced the error message "wrong disc".
I installeted Patch 1.52, same error. I'm german, so I've the (one) DVD.
Anybody help me please?

I've got Windows XP Home Edition, Version 2002, Service Pack 2.

Thanks,
Atrovent