Technical issues with Heroes III.

Question: I have the Heroes HD 3.25 mod installed on the Heroes of Might and Magic III: The Shadow of Death client (patch 3.2) from Buku. When I create a multiplayer game, the icons for selecting a map or creating a random map are grayed out and inactive. When I launch the original executable without the mod, everything works fine, but with the mod, online play is impossible. In offline mode, both with and without the mod, map selection is available, and the generator is also accessible. These problems started after I updated the HD mod from version 3.15 (in that version, everything worked fine in multiplayer) to the latest version of the mod. Can you suggest how to fix this? Reverting to an older version is not an option, as people are playing on the latest version, and there would be incompatibility issues, and I no longer have an archive of version 3.15. In general, it's a complete mess, and I've already tried everything I can think of... P.S.: OS Windows 7