Why can't my pc or Dvd-Cd rom Detect Left 4 dead 2 dvd?

[JackD]

You see i just bough l4d2 and the problem is that when i insert the disk, it loads but after a while it stops then cant get detected even if i open E/:

and yes i meet all of the reqs. of the game
You see i just bough l4d2 and the problem is that when i insert the disk, it loads but after a while it stops then cant get detected even if i open E/:

and yes i meet all of the reqs. of the game

@boro: dude its a 7gb game and i have crappy internet