Ok....I took the faceplate off to take a look and low and behold I worked the lever and the presser foot went down. I also noticed that it is a bit gunky in there and the presser foot lowers slowly....but it lowers. Now I also noticed that the screw that is attached to that lever was loose so I tightened it. I brough the presser foot back up and then lowered it again and that screw loosened again.(sorry if my terminology is incorrect but although I am mechanically inclined this is all new to me.....in other words my first)MY question is....is that screw supposed to be tight or loose like it was?