I don't have that machine, however, if your quilt sandwich is too thick, the needle will be prevented from coming all the way out at the end of the stitch. When the hoop moves to make the next stitch, the needle is a bit flexed so it will hit the plate and break. What batting are you using?
The other thing to check is to make sure that you are using the correct brand needle for your machine and that it is inserted all the way into the shaft.