Only Scooby-Doo:(

Like many young kids I loved watching scooby-doo as a child, but lately it is getting out of hand! My dvd player seems to have a mind of it's own. The only dvd that seems to be capable of playing in my dvd player is Scooby-Doo and the Witches Ghost. Don't get me wrong out of all the scooby-doo movies that one is my absolute favorite, however, a person can only watch so much scooby. I have cleaned the dvd player multiple times with the lazer lens cleaner and still nothing else seems to play. I just don't underdtand. Seems to me that it is just time to retire my current dvd player and buy a new one.