Have you tried a smaller throw away piece? You know a small quilt of the same thickness? Have you changed the tension? Does your sewing machine need a tune-up? Do you have an ironing board ? Set it up on the other side of your sewing machine so the quilt has support? Do you need a new needle? Maybe you need a break....Start a new project and walk away. Give it a few days then try again. If all else fails go buy new fabric. It works every time.