Bought this new (Crysis maximum edition)

[ScrubZ]

And I'm having trouble installing this, the cd keys are not working for either disk, I have tried various attempts and replacing letters that can be mistaken such as U and V

But nothing, and it annoys me becuase the store refuses to accept the return of the game.

[WizardsMilk]

This is the Steam foruns. For the community that own the Steam version. No one can help you here. Contact Crytek directly.