You've been duped, obviously you didn't buy the original game, instead you got a game that was downloaded from the internet and packaged into a CD. I know someone that was into selling something like that before (could it be me?

) Well the good news is that there's a solution to your little problem, visit
www.gameburnworld.com and search for a "no cd crack" for your game or better still, do a google search for Fifa 2006 no cd crack, download it and copy the crack into the download directory of the installed game, you would be prompted the file already exists in the directory, go ahead and replace it. Finally, double click on the crack file, your game would load with no more "insert the correct disc" bullsh*t" again. I hope your PC can handle the game, enjoy!.