Is your bobbin wound and put in correct? I once couldn't figure out why the bottom of my FMQ was messed up, and after a lot of yelling at the machine, turns out I had threaded the top needle wrong :oops: So first then, check and rethread anything you can.
Is it possible that you need a new needle? Or perhaps the tension is off?
I'm not familiar with your machine... these are just things that I have done