Welcome, I hope things go better with your machine. I don't have the same machine as you but I think most LA machines need to use a heavier weight thread. I use 40 weight and the needle I use is 18. Your needle eye may be too small for the speed the thread goes and be cutting the thread. I've also found that less tension on the bobbin helps. Try one thing at a time and see what works--if you try them all at once you won't know what actually helped. Good luck with your machine--LA quilting is fun when things go right.