Whats going on?

[Macphal]

First off my specs:

CPU: AMD 3800 x2
3gb of ram
GeForce 9600gt
Sound blaster gamer sound card
and im runing windows xp.

When i first downloaded and installed the game it had no sound. my sound works fine outside the game, but nothing in it. I checked the settings and all the sounds options are on. I saw i had version 1.6.4 and i saw there was a patch for 1.7 so i downloaded it and installed it. Now when i try to play it, it asks me to activate it again. So i try activating it with the same code gamersgate gave me, but now it don't work! Whats going on?