Måske løser version 1,6 problemet, gå til:
http://www.eagames.com/official/battlefield/1942/us/gamedemo.jsp?state=010010 og tryk EA games
Ham her har løst problemet:
Så här står det på Fragzone om ditt problem , din cd-key är alltså inte upptagen.
"gå in där du har installerat bf:V
och sen gå in på en mapp som heter eReg och starta
Battlefield Vietnam_code och där skriver du in din cdkey
Exempel; C:\Nisse´spel\Battlefield Vietnam\eReg - Battlefield Vietnam_code skriv din cdkey"
http://www.dslreports.com/faq/7279
If you are having a problem with "Invalid CD Key".Don't worry you can still play on this server
http://nwn.vaizdas.lt/~t1000/bf1942/ (nwn.vaizdas.lt:14567) it's version is 1.5 for now.
It's common for people to go into stores and open packages and get the CD-Key, or buy it, copy it, get the key, return it.
It's possible that may have happened, unless there is a technical issue with the game, you can try going back to the store you bought it from and explain the situation, they may be able to exchange the game for another 'non-returned' or opened one.
VH Palle Hansen