serial no. error in lan game

[wot4]

Hi fellas.
I have made a copy of Yuri's revenge so my lads can play against each other on our LAN, but when we set up the game and try to join it tells us where useing the same seriel no#. anything u can help with will be much appreciated, especialy by two 13 year olds!!

thanks for your time "wot4"

[EMPiRE]

For every game installation you will need an original/bought game to be able to play the multiplayer option over a LAN or the internet

So have your lads buy the game!