Torch will not fire?

I have a new Command CNC set up from Candcnc. All new install and computer set up for Linux. All offset and other tevchnical needs set up and has been working as it should for the last few weeks. Recent issue of torch moves as it should but will not fire. Tried unpluging at AC and reinstalling all cables. Tried different Tap files. Hypertherm 65 torch cuts as it should when replaced with hand held torch.DTHC makes audiable click noise and all necessary lights lit.. Replaced consuables. Still wont fire. Any ideas?