I cant figure this one out

Im running the PC version of Virtua Fighter 2 and have set it up like any other pc game to launch via mamewah. Only mamewah is behaving very strangely with it, this doesnt happen with other pc games.
Mamewah launches the game as usual, but for some reason key commands made in virtua fighter are transferring too to mamewah - eg I press player 1 start on virtua fighter, it starts but also launches the next game on my mamewah platform list , which means I get two apps running and chaos.
Hopefully this makes sense. Im not sure why vf2 is sending mamewah crazy. after all of the probs i have had trying to get this game to run on my cab, maybe God simply doesnt want me to have VF2 - who knows!
Any suggestions?