Leopard not recognizing my Installer disc

[macaaaaaawesome]

About two weeks ago, I lost my Utilities folder. I tried everything, then I tried to take the utilities off the disc that came with my MBP, but after about 30 seconds, the disc ejects, without doing anything. What should I do?

 

[flopticalcube]

If you can, run the Apple Hardware Test on the install disk.