SearchResults is always empty after FindSessions call in another computer in LAN

Hi!

My code is the same as in this tutorial. I posted my code here. It work fine when I run both instances of applicatin on the same machine. But, when I host session on one machine and find sessions on another machine in LAN, SearchResults is always empty.

Firewals and antiviruses is turned off on both machine. Ping time beetwen them is less 1 milliseconds. I can use shared files from one machine at another. One machine is Windows 7 (64 bit), second is Windows 7 (32 bit).

May be I need something configure in project settings to allow finding sessions from remote machine?

Thank you!

PS: I cannot use later versions engine for some reasons…

I found solution in this post. But I wonder, why is necessary to disable VirtualBox network adapters? The Unreal Tournament 1999 works fine with enabled VirtualBox network adapters!