Power Plasma50 THC

Hi, I have a Power Plasma 50. I have it on a homemade plasma table, been running it with out the THC. The cut quality is horrible! I do have a Proma 150 THC and have tried to hook it up but not real sure how. It is powered up and run thru the CNC port of the plasma cutter, but when I turn on the THC in Mach 3 it will not do anything. This is where I have no clue what I am doing. We removed the voltage divider inside the machine. Can any one tell me what I am doing wrong please?