Recently, some conversations concerning Diablo clones, sparked my interest to give Titan Quest a fresh new playthrough. Alas, i encountered a terrible problem. I would be really grateful if anyone could help.

I have the Gold Edition Retail, now in windows 7 system. When trying to install, in the place you need to fill in the key, after you type the key, the button "next" remains grey and unable to be used. Only back and cancel are usuable. It is not a matter of wrong/used key, not even of not accepting it; i type it, and the installation cannot progress, next button is grey, unselectable and dead.

I understand GoG has not this game, i see that asking for help on a game not sold here is pretty much stupid, yet still, since many people play and like it, i was wondering if anyone could be of help. I have never played it in multiplayer either, so i was seriously hoping for some coop fun...