I've FMQ on mine ok too. Some people use the single hole (I didn't), but that might make a difference.
The other thing I found, you need to make sure that the FMQ foot is adjusted so that it barely skims the surface of the quilt...if it's too high it will cause skipped stitches and thread breakages. There is a little screw at the top on the right that will raise and lower the foot. Try adjusting the foot so it's just high enough and see if that helps