Wow, maybe I need to take reading 101 again. I keep missing the key points. I thought you meant the needle was stuck.
If the presser foot lifter moves and the presser foot doesn't, you'll have to figure out what is disconnected or broken. If neither will move, then it's probably just stuck. If you have an amber colored film in that area, then it's probably old dried up oil. Someone may have used some WD 40 on it or something like that that left a lot of residue. That brings us back to cleaning, oil and heat. The heat will soften up the gunk, the oil will dilute it and your lever should move.
I just spent about 2 weeks on a 401 that I couldn't get to move (in this case, zigzag). I re-cleaned and re-oiled it numerous times. It eventually moved and runs fine now.
bk