Hi guys!

We have 4 active players in Russia, so of course we tried to
play together, but the problem is - we can't load a game in multiplayer.
We can connect to one host, but when we start - it says that versions
are incorrect, or just game crashes, or just goes back to arena menu. We
can duel each other and that's all. Even with three persons we have game
crash. Two of us have winXP, two - win7. Who
has winXp plays without Hazars's mod extended(just original game and
expansion), and others do. Because without it on win7 there is a color
problem and game is lagging hardly.

Does anyone know what's the solvation?

I would try installing hazars's mod on both the xp versions so that all the games have exactly the same patchs and mods then try again.

Any other advices guys?

I take it that didn't work then?

nope. -( so no other solutions at all?
sad -(
/upd

By the way we've done it last! We can play three persons at one game, but when comes fourth - all crashes. (