Step 1
IV:MP T4 requires GTA EFLC and path 1.1.2.0
I had the same problem with ''connection lost'' the fix is there, download this ones again since they updated once more after the post was made.
and then replace The old ones and only use the Launchers in the comMP Folder.
1. Reinstall the mods
2. Open the game first
3. tab out start the second launcher
4. click on argo and then tab back in the game and it should connect.
5. Login in with your normal acc from T3
Test started now and will happen until 00:00 GMT. Changelog updated.
You must update your Client files.Download here