Hi all, I have an Apex Digital AD-1110WM. The

Hi all, I have an Apex Digital AD-1110WM. The symtoms are: The disc loads, it speeds up, then it slows down, speeds up again, then it displays: UNKNOWN DISC. This is with a factory disc. When I insert a home made movie, it keeps tracking back and forth and sounds like it has stripped gears. Again, it displays plays:UNKNOWN DISC. All esle seems to be functioning properly, including the Apex logo on screen and displays: NO DISC, when I don't load a disc into the unit. Can someone please let me know if this sounds familiar? Maybe someone has experienced the same symptoms and would be kind enough to share it with me. Thanks for your help in advance.