I'm having a few problems with TGB Dual.

I downloaded it recently from this site. Installation was succesful and I can play on GBC an GameBoy games. Unfortunately, I have found that i am unable to control the second window. This disallows me to link both Pokemon Gold and Silver together and get the Pokemon I want. Also, I have tried using the built in Game Shark. I have typed in the codes I want, eg. Infinite rare candies, Infinite Master balls, etc but they do not work when turned on.

Any help would be greatly appreciated, thank you.