Hitman 2 Not Working...please Help Me!!!

hey, i hope someone can help me here. i have a really frustrating problem. i recently got a great game called Hitman 2 (its burned). on the first day i installed it and played the game. i enjoyed it a lot. on the second day i click the hitman 2 icon to open the game and a message pops up and says insert the hitman 2 cd in the drive, so i do so and absolutely nothing happens. i then click my computer and try and open the game from there and it says there is no cd in the drive, but there is one. my cd drive will not even read the hitman 2 cd, but it does read other cd's so i dont think the problem is my cd drive. i dont understand how this happening because it worked properly on the first day, this has never happened to me before. i am requesting help. Pleaswe someone help me!!! i ill greatly appreciate it. thank you.