The game obscure

[Confustbygames]

Hi I'm new here so I am not sure whether I'm posting my question where it should be. I've bought the game obscure a week ago, legal and with it's s/n to play it. I can't work out this, I can install the game perfectly, but when I put the code from the game when asked for it, it comes up after checking that it cant find my cd, but when I check the icon of the game clearly shows that the cd is in fact there. My question is, after several times of installing and unintalling it (no mention the headaches!), what is going wrong here? My pc has the asked requirements, checked those first, even got on to look on its official site, where I can say theres nothing there to help me out, so I'm at a loss really. I do like to see it working since I've paid enough for it, maybe one of you could help me out?