Replying to Help with a Broken PX14 Heelpiece

The other day I was skiing the woods and I lost my forward pressure on one of my PX14s. When taking a closer look at the binding I noticed that the metal tab that you lift with a screwdriver in order to adjust the forward pressure was completely broken off. Now the heel piece is locked in the track and there seems like there is no way of getting it unlocked/off. Anybody have a solution for removing the heel piece off the track? I've got another heelpiece I could easily slide on the track, but thats not happening I get the old one off.