[AhhhFresh]

Originally posted by Edric:
The cdkey asked is something like 1234-1234-1234-123 but the one inside the notice is something like 12345-1234-1234-123 => game say wrong cdkey of course.

Did you try leaving off the first digit? I don't have my manual with me here at work, so I don't know what the format is... but since you're saying all the number blocks have the right number of digits except for the first one, I would try leaving out the first number of the first block.