Try UDP 5 and see what happens. I just installed the app (on iphone and ipad), selected UDP from the game options, then selected the right-hand option at the bottom of the app start screen (can't remember what it says here) and it started working. I'm running gear/rev counter on my phone which is stuck to my wheel and my ipad is on a stand on my tv cabinet with a different screen active. It's damn cool. Hope you sort it.