Turntable set up HELP


OK, I have majorly messed something up and need expert advice. I set up my turntable a few months ago, and had no real problems, but I wanted to take it to the next level so I bought a Walley Tractor (well I ordered it in October, got it in January) and I tried to use it today. Well after I adjusted the cartridge using the Wally tractor, re-adjusted the needle force and anti-skate and put on a record. Well about 2 minutes in the record started to skip. Adjusting cartridge force again, anti-skate nothing helps. All the records skip. Platter is still level, I can't figure it out. Took everything off, re-set up, still skipping???

Help!!!!!
macdadtexas
I did re-set up with the Clearaudio jig now, and still skipping?? I am stuck, what the >>>>>>> ?????
still attached, sounds fine until it starts skipping, and I have adjusted, re-adjusted, and re-re-adjusted the antiskate. Dudes I can't figure this out??? It was fine....
Your stylus might not be straight. Examine it from the end of the cartridge. It should be 90 degrees on each side. If not you will get the skipping you describe.