remember that you have to have air in order for it to work. Nerves are designed so that you have to have air to move the bolt forward. What I am saying is yes, even if your eyes are seeing the paint, if you don't have air the bolt will not go forward, because there is nothing propelling the bolt, or forcing it to go forward.
IF YOU DO HAVE AIR:
If you do have air going to your nerve, and it still isn't working, turn the nerve on. Then see if it works..if not turn vision off, then turn vision back on...it works on my nerve when the eyes don't work.