I recently bought a hypertherm 1250 and had a 600. when I went to convert from the 600 to the 1250, i followed the video that plasma cam issued, It looked pretty basic. But the machine won't fire from the computer. Do I need a different connection from the plasma cutter to the computer? The video plasma cam sent they all looked the same. Also I have a question on the video they cut the trigger wire and reconnected it in place. I'm assuming that it's a dummy wire so you can reconnect to use it manually.