What I ended up doing was just installing an older version of the savior mod because I got the same problems of being auto-disconnected when I tried to join with the latest patch. I guess those servers haven't been updated or they view the incoming player's data as too risky (such as a hakzors/modders) and simply disconnect them.
I have the UMP2 but I never see anyone on the one or two UMP2 servers when I'm on. Shame too, since there are some fantastic maps available.