Try a different type of needle if different size doesn't work. I use everything from embroidery to Jeans, depends on the fabric, batting etc which type works for the project. I find it's usually it's the needle if you have skipped stitches. Just got back from get together quilting teen quilts today, I have the 2056 also and was doing free motion and used a sharp needle today with no problems, poly batting.
Good luck. Laurie