I have an 84' Tommasini with the Campagnolo rear dropouts that have the adjustment screws. When I first rode the bike, after completely updating all the components, the rear wheel slipped out of the dropout on one side causing the wheel to stop the bike by rubbing the frame. I tightened the skewer and tried it again. The problem still continues and is worsening. I had the dropouts aligned before I put the bike back together. The adjustment screws were also replaced and everything seemed to line up OK. When I put some torque on the crank, it pulls it out of the dropout every time now. Any suggestions?