I agree with Jeanne. I use a very high loft batting (Warm & Plush) and had to lower the tension on my presser foot in order to get everything moving through okay. I would maybe try that & also would baste it using darning foot in a spiral rather than lines (or as an astrix if you really prefer walking foot, working from center out each time). Flannel is a bit trickier, but I'm sure the high loft batting is most likely your culprit.
Last edited by Bree123; 04-07-2016 at 03:57 PM.