my pioneer dv333 has been great. it plays everything flawlessly, but i am now having trouble with the disc tray. i'll press the open button and the tray will open.. but then close immediately after opening. i can try to put the disc in really fast, but i'm not sure why it won't stay open. if i keep hitting the open button eventually it stays open, but i'm not sure what's wrong with it. has anyone else experienced this with the dv333 or any other player? any ideas out there? thanks.