I bought a previewed DVD from Blockbuster Video. Since I owned it, I figured it didn't matter if I removed the label in the middle of the disc that said "do not remove". I figured that was there for their security system. I don't know if that caused my problem, but this only showed up when I put this disc into my player. The player now says "dealer lock on". It won't let me open the player to remove the disc. It also won't let me turn the power off. How can I turn this dealer lock off so I can use my player again?