version of EF for LAN

I'm trying to play with friend via LAN. He has no internet connection, while i have fully updated version. So i tried this:
- I gave him same version of COH as my own
- Then he installed EF in case that comp needs some registry entries
- After this, all my files (COH and EF in installation dir) was copied over his
But still we cant connect because of version difference. Q is, wheres the file or reg entry with version number, so i can overwrite right version number? or can u recommend something else how to do this?

You will find your registry key in the same path than /Company of Heroes key is, just look again ;).