I've got the same problem, although I'm running Windows XP (2600 build). When I try to create LAN game it goes to the island and mission selection, but when I press OK - nothing happens. Tried all versions of game - didn't help.
I've got ADSL connection to internet and also have my computer connected to home LAN. Here is my config:
Pentium 4 1.7 Ghz
256MB RAM
Geforce 2 GTS 32Mb DDR
Sound Blaster Live!
2 Ethernet cards
Any idea how to solve the problem?