Making sure the ecu plug is pushed fully home would be my first port of call!

As for the boost, do you still have a standard plastic dumpvalve? There was one on my car when i got it, it was leaking like a fucked fridge and loosing me loads of boost Check that and check all the hose are on and you have no airleaks. After that look at adjusting the actuator.

To be honest i'd probably change that chip to one from a know good company and set the car up the way they advise, that would be the safest route!