is the screw counter sunk into the body...if not you could try using a small pair of pliers and gently turn the screw....the best sort are found on the leathermans tools as they are nice and small with a good grip...
small warning though...be carefull of the anno....i used this to release a screw on an ion (yes i know crappy powder coat etc etc) and it has wrecked the area around the screw...but then i needed the screw off so ce la vie.