pbnjoe: So you're saying when you click Multiplayer in the Warband menu, you aren't shown a screen where you can make a profile and host/join a game?
Crazyigor95: No, it's With Fire and Sword btw. I can create profile and i can go to server list, but when i choose server and click Connect, empty box appears and only thing I can do is to click continue
Hmm, I haven't seen that sort of thing before but I'll try suggesting things anyway. Have you tried with multiple servers? Made sure that the servers don't have VAC on them? Did the game ask you for your key at any point in time? Is the "compatible with module" (I assume that it's WFAS too) box ticked?
Actually, I get the feeling that that box is trying to ask you for your key, as that seems to be the right time for it to do that.
I have an idea that may work. Try opening regedit, searching for MountAndBladeWarbandWFASKeys, and if it exists, double click Activation Code and enter your key. If it doesn't exist yet, I don't know what to suggest, except for asking Support.