Considering the update to newest patch is a wrong move, like all forums sayd and specifically the map makers, I propose to login from INGAME realm to play LODI with 1.26 patch. Also admins commands will work fine.
The private communities like Iccup, rgc or w3arena are on 1.26. Map developers DO NOT support 1.27b until Blizzard will not fix their shitty updates (they messed up core engine with latest patches)
Steps to connect to INGAME realm:
1. With w3 turned off, download attached realms registry and run it to add the realms in warcraft 3 battle.net gateway. Now INGAME realm is default gateway.
2. Update: I recommend you to have two versions of w3, i mean 2 folders, 1 for 1.26 and 1 for 1.28.x.
1.26 to play IMBA or LOD
1.28.x to play other maps.
3. Start w3 from w3l.exe, create a new account in INGAME realm, login and go play IMBA
4. After account is created Gproxy players must update the server in gproxy.cfg:
server = ingame.go.ro
war3version = 26