PS2 Tray error message

[Ontario Boy]

last night when i was playing a PS2 game  I constantly get a message saying "Disk Tray is Open please close disk tray"   the tray was not open  what is causing that message to come up when the tray is closed?  

[P.C.]

There are couple people that drop by occasionally that might know the answer to that Ontario ....but unfortunately I have no idea.

[Ontario]

looks like i might have to buy a new one if this problem get's worst