foaming

Hi, I have my kegerator balanced with about 5m of 5mm ID lines. and it pours perfectly wheat beers at about 25 PSI (makes it about 4 volumes of CO2 at 2 degrees C) on the regulator with regular intertap taps. I have decided to get a flow control intertap and put in cant seem to make it pour...

** IN SHORT BREW IS FERMENTING AND CREATING EXCESS FOAM AND MIXING WITH HOPP RESIDUE AND ERUPTING BACK OUT MY AIRLOCK. (For more datailed description read below) Currently brewing a 23ltr coopers Heffe wheat beer kit. Initially i boiled 12ltrs water with 300g LDM ,30g Halletau & 30g cascade...