How to connect multiplayer on Metal Gear solid : peace walker on ppsspp mobile

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Me and my friend have been trying to connect how device to play multiplayer on Metal Gear solid peace walker on our Android device but it doesn't work. I've tried multiple suggestions but it still doesn't work. We both use ppsspp gold emulator on our Android phone. Please any suggestion on how to connect it, I'm not talking about the versus mode. We're trying to play the mission multiplayer mode together but it doesn't work, please give me suggestions if you have played it together with your friends before, if possible a video tutorial would help alot