Tks so much for your quick response. I am using a stitch regulator & I have changed the size of stitch to a 3 but still no success. My pins are about every 3-4 inches apart. I never thought about spray basting, that just might do the trick. I still think there might be a problem with the backing fabric but am not sure. Has anyone else run into this problem with the backing?? I took some scraps (of the same fabric, batting & backing) & they were fine when I sewed them so this really has me stumped. I have only been quilting for 1 1/2 years so I don't have a lot of experience so I would appreciate any help available.