Danny Doesburg

I just reinstalled my pc with Windows 7 Ultimate x64 in order to fly with the B737NGX. Yet when I start FSX, I have to enter my activation code for the B737. This happens successfully. My FSX loads the 737 wonderful, so I thought. But when I wanted to depart at the gate, I had to activate my APU in order to start my engines. APU has been started but I can't select the APU power. I hit the switch to select the APU power, but nothing happens. Also if the external power is connected at the gate, the selector doesn't activate the GPU. I hear nothing, like air flowing out of the A/C packs or an APU that is starting up.... The EGT gauge of the APU is working though, and the APU is available but unselectable. When I restart my FSX, I have to enter my activation code again! And everytime I restart my FSX. Why does it do that? I have installed everything properly. Getting bald over here... Used to have long hair.... Please help! Goldenshark