FX Impact: Regulator Pressure Problem

I had a leak in my Impact and replaced the O rings in my Huma Regulator. That fixed the leak but now my Regulator Pressure Gauge and Bottle Pressure Gauge read the same. I cannot adjust the Regulator pressure and, when you remove the bottle, both gauges bleed off. I haven't been able to find any information on this problem, so any help would be greatly appreciated. 

Thanks,

Tom