Problem solving session at work

We received our PCB a few weeks ago. I checked it out to verify all functions are working, but there was a problem. The flyback transformer doesn't charge to a high enough voltage. I invited a senior engineer to help me scrutinize the problem. After a few bit of tweaking and probing, he identified the culprit. Looking at the supply voltage drooping each time the mosfet is turned on, he pointed out to me that the storage capacitor is starved of charge, and it doesn't have enough time to recharge itself to full before the mosfet turns back on and discharge it again. This cycle repeats as the pwm continues to run. The solution is to slow down the pwm. This can be accomplished by widening the off time, leaving the on time intact. As we troubleshot this problem, it was getting close to the time for us to leave work. We'll check back tomorrow to see if the circuit can be fixed by changing the pwm, and the duty cycle.