Version 2.04 Warning The current version (2.04) is not compatible with the previous versions of the game when playing via network. Both the server and client must have appropriate versions of the game (2.04) in order to connect. Notes on
IL-2 Forgotten Battles: Ace Expansion Pack Readme Version 2.01 Warning The current version (2.01) is not compatible with the previous versions of the game when playing via network. Both the server and client must have appropriate versions
What's new in Version 1.22 Warning The current version (1.22) is not compatible with the previous versions of the game when playing via network. Both the server and client must have appropriate versions of the game (1.22) in order to connect.