My walking foot allows me to use all decorative stitches which is great. Not all do. My question is, did you put the arm that is on the walking foot on the needle screw. If it isn't put on the right way it won't feed the fabric thru right. You can also do adhesive spray to help hold the fabric down and then try to only put your pins where you don't think you'll be sewing. I'd check to see that the walking foot is put on correctly because it sounds like it isn't doing its job.