power - DC square wave Transformer

^{simulate this circuit – Schematic created using CircuitLab}

I have dc into a bunch of 555 timers to create a square wave single that goes into the gate of the n-channel mosfet. im trying to power a transformer with 60 volts dc power. the resistance on the primary coil of transformer is 4 ohms. why will this not work? i do a open circuit test on transformer. it pulls more than 2 amps with no load. need some advice. i just need this transformer to work