Now I have No GSX in the P3d 5.1
First, you haven't said if you have audio now. Not that this has anything to do with registration or activation but, since you jumped from an audio problem to another problem, is not clear if this means the audio works now.
In any case, nothing in the screenshot you posted says anything to do about if you have GSX or not. If with "GSX", you mean the base program. You only posted something telling you don't have the GSX *EXPANSION".
It says I am not registered, when I click register, it still states not registered.
When you click "Register Serial", it surely doesn't say "not registered". It will FIRST ask to insert a serial number and THEN will either say if the registration was successful or not, and surely not with a "not register" message, but with some clear and specific error message.
However, as explained so many times in the forum and the manuals, you should not post questions about orders and activations on the forum because, of course, my next question would have been something about your key or your order, which we cannot obviously share here.
That's why questions about orders and activation should always be made using the support EMAIL.