DVD detection issue

[YeboahConstrictor]

Hi guys,

A colleague is trying to install The Sims 3 on his desktop but the game is not being detected and the desktop believes that the drive is empty.

Any other machine detects the game fine and has no problems installing.

Any other disk is detected fine on his desktop, it just seems to be this disk.

Has any one got any idea as to what could be causing this?

Cheers,

YeboC.