What should I do when I get a CD Key in use message?
   
 Make sure that you never give anyone your CD key. If you gave your key to another person and they log in, you will not be able to play on the Internet.

If you have never given your CD key to anyone and only have one system connected to the internet and are receive the CD key in use message.
Try the following:

1) Click on Tools in on you internet explorer
2) Click on internet options
3) Click on the delete files under Temporary internet files.

Also clear your internet history

1) Click on Tools in your internet explorer
2) Click on internet options
3) Click on clear history under History

**You may need to restart your computer for the changes to take effect**

Also try uninstalling and reinstalling the game.

If the CD Key for Battlefield 1942 will no longer work when connecting you will need to send the following information to the appropriate support department:

1) Name
2) Phone number
3) Address
4) Email address
5) Serial Number (CD Key that is not working)
6) Attach a photo of the back of the CD-ROM jewel case showing a legible copy of the CD Key

If in the United States or Canada email support20@ea.com or FAX 650-628-5900. !! This is for U.S and Canadian customers only. If outside of North America please refer to the games documentation for the correct contact information.