having a problem with tack welding...i tack about 4 or 5 times and over current light comes on and wont weld but still feeds wire,so i turn machine off and start to weld and no problems but when i go to tacking again 4 or 5 tacks same thing again....have already contacted dan i think is his name and he hasnt gotten a n answer for me yet been about 2 weeks.anyone else have this problem?