Welding Tips and Tricks

I purchased a new mig gun http://weldingdirect.com/00bi14kstmig1.html and hooked it up and went to turn the mig machine on and got nothing. I don't have a multimeter at the house so I have to wait till Monday to get one from work. I might have needed to get the double wire trigger instead of the single wire but I was not sure since the original gun was rigged.

How the new is wired I really need this thing to work so any help is greatly appreciated.

I checked the voltage on the other side of the on/off switch and it has voltage. So now I really don't know what it would be.

I don't really know where to check next. I checked the voltage going to the relay and it has voltage. I really don't know where to measure the voltage next any help please!!! I need this rig to work I have welding to do on my truck and I also have to weld some stainless steel. Help please!!!

I can take more pictures if needed.