JVC FS-S77 Micro 5 Disc DVD Audio/Video System Home Theater Shelf Systems (FSS77, FSS-77, FS-77, FS7... Shelf System "surround sound system xv" Questions

surround sound JVC dvd/cd player, model number XV-THC6. we put a movie in this morning, and now it says "locked" we can't get any of the tray's to open. the movie thats in there will still play though