I make use of an original copy of call of duty 1.4. I am able to play the single player edition but I could not play the multiplayer edition. I heard something about game spy or of a no cd crack but I could not find anything till now. Could someone help me?

For no CD cracks - try here: http://gamecopyworld.com/
For GameSpy Arcade - http://www.gamespyarcade.com/

Although I'm not sure if either of these will help you. The No cd crack certainly won't make the multiplayer mode suddenly work.

What's happening when you try to access the multiplayer mode? Do you get any error messages? It could be something on your PC like a firewall stopping the game from getting access to the internet.