I have gone crazy trying to use my Phaff 4852 Coverlock, it keeps breaking threads...help?? I have threaded it at least 10 times exactly following the instructions

1. Take your throat plate off.
2. Turn your hand wheel towards you while you look at the needle go before the plate and begins to rise again.
3. The thread should slide across the bobbin carrier/bobbin without getting snagged. If it gets snagged the brackets that hold the carrier in place are pushed against the carrier too tight. They have to allow the thread to flow.
4. Check the bobbin pressure. The bobbin tension should be equal to the top tension. Attempt to equal the tension of four if possible.
5. Put your pressure foot up.
6. While you thread the machine give little nudges to check for snags along the way. The thread has got to go through the tension disc without error.
7 Once threaded put your foot down. Pull a little bit on the thread. It should have some resistance. Lower and raise the tension to check if the resistance changes any.
8. Sometimes the tension disc has to be blown out. This is also true about the tension spring on the bobbin case. You might want to put something thin between the tension disc to ensure there is no lint stuck.
9. Make sure the needle is the right one for the thread being used.