Try increasing the presser foot tension. Not sure how to do it on that particular machine, but it might help.
Also, remove the bobbin basket and see if there's damage. Sometimes the needle will go right through it, or rough it up. You can smooth it out with a very fine sandpaper -- about 400 to 600 grit. It only takes a few swipes with the sandpaper -- be gentle.
Sometimes, the "finger" that holds the bobbin basket in place needs to be adjusted. There should be a very small space between the finger and the bobbin basket, so it has some wiggle room. If it's too tight, it's a problem. If it's too loose it's a problem.
Sometimes the bobbin basket jumps past the stop spring in front of the bobbin basket.
I know people get upset with me when I say it, but I see this problem with the plastic drop-in bobbins jamming when trying to sew over uneven or heavy fabrics, all the time!