first thing I would check is if the plasma is being triggered. if your controllers relay is working and the plasma is triggering but it is not firing the torch. then you might be dealing with a parts in place issue. also there is sometimes a spring inside the retaining cap on the torch which is holding contact on the electrode. if this is not making good contact it can cause a misfire.
check that your torch lead is fully locked into the plasma generator
check that your CPC connections are all tight and the your CPC connector is secured
let me know if any of this helps.