I am trying to run N64 games through retroarch using the mupen core. I have successfully mapped all the buttons on my retrolink controller. My problem arises when I play a game ,like mario kart, where I need to press both the right shoulder button and the a button at the same time. When I do this, it seems to start up netplay or something. I've checked to see if hotkeys are set, but they are not. What am I doing wrong? Any help would be appreciated. Thanks