1) check with you dealer to see if there is a special quilting bobbin case you should be using;
2) always bring your thread up before you start
3) get an extra sharp needle, at least size 90/14
4) if you have been quilting with your feet lowered, put them up, or if it hasn't worked with you feet up, put them down (my machine works best if I leave them up)
5) rethread, clean out bobbin case of lint, make sure enough thread is on your bobbin (low thread causes problems
6) sew slowly, practice basting with free motion before do real quilting (use white or contrast thread so you can get it out easily)
7) use an open toed darning foot, or if you are try
8) using the walking foot, with a little less pressure (dial back upper pressure)
9) have a small glass of wine, chat with a friend, check out all of the above and try again.
Good luck. I do my own fmq and I love doing it! Doesn't always look professional, but it's MINE.... the whole quilt..... and that matters to me and to my family.