2 player disables the player 1
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Hello, I made a chest joystick (leverage) and the buttons. In the player 1 I have the joystick and 9 buttons (A, B, X, Y, L1, R1, select, start and hotkey) and is connected to a USB interface 2 players, to pin up (leaving the entry USB on the left). In the 2 player I have the joystick and 8 buttons (A, B, X, Y, L1, R1, select, start) and is connected to a USB interface 1 player. The problem is that when just set if they go well and I can move with both the menu and look for the games, but when I start a game for 2 players (such as the anti-mame) the player 2 lost settings and not let me press start. The truth is that you do not find any logic, because the controls they are connected in 2 different interfaces and should not be canceled each other