I've fixed this before.
Delete map related ****, it's not needed.
Try doing this:
Backup the GMAP and levels. Remove the gmap from the server options.
Now, first upload the GMAP. Then add it in the server ops and then upload the levels.
Wait a while and if it DOES load, even if you cant see other players, try updating the level you're in THROUGH RC. This will update the entire GMAP. If it still doesnt work maybe try disconnecting the NPC server and calling it again.
It should eventually work.
