Speaker buttons and left side convenience key

hey guys about a week ago i broke my midplate trying to get out a stuck screw. today the midplate i ordered from cnn.cn came in and i did the replacement. it fixed everything but my speaker buttons on the right side and my left side convenience buttons arent responding still. the little metal contacts things are there but i guess they arent reaching whatever they need to reach. do you think if i put a little piece of tape there it will help and make the buttons work again?