I what the code for the game asphalt 6;adrenaline wcg edition.when i start playing the game,it is stoping and demand for the code.

The code being the CD-key? If this is the case, your game is unregistered. The code is found on the inside of your case, usually on the game pamphlet. If you have not purchased the game, you are playing it illegally, and need to purchase a legitimate copy of the game to play.