okay here i go again......i have changed every knob on the machine.....and tried to sew and can't get the material to feed through.....tightened the tension and loosened the tension and nothing working for a staight stitch.....if i change to a small zigzag stitch it will feed through but want to do a staight line of course........this machine hates me........i've looked in the instruction book and no help there........so please someone give a good ans. so i can get back to sewing. thank you