I have this Ridiculous problem with my copy of NFSU 2

I take the disk, I put it into my xbox 360, I close the tray, I hear the disk begin to spin faster and faster, I wait about 5 seconds, and NOTHING HAPPENS

The Disk NEVER loads the xbox 360 just stays in the dashboard and doesn't even recongnize the disk as Need For Speed Underground 2. For a matter of a fact, even though the disk is in the 360 I can open and close the disk tray through the Dashboard


Does anyone else have or had this problem?