CD-key error

[nz2008]

Hi

I've installed EAW form the Best of PC, then I tried to install FOC, but it tells me: invalid CD key.

I went back to the dealer and exchanged my copy, thinking it's a CD problem.
New cd-key and new installation: the same error message pops up.

What can I do? Is it a faulty batch or can it be a computer problem?

I've tried to install it on a second computer, EAW then FOC, but i still get the same message trying to install FOC...

Any idea?

I'd welcome any suggestion

Regards