Yeah I have the same problem to. Tried the datarate, checked the uierrors. tried different servers. Always get booted at the namserver part. This was in the dbg.txt file if it is helpful to anyone.
Wed Feb 19 20:02:14 2003]00479:Start world 9: Now you've done it. You've gone ahead and looked. Now it's all gonna break. (name sprites done)
[Wed Feb 19 20:02:14 2003]00480:Start world done. (load2)
[Wed Feb 19 20:02:14 2003]00481:load done.
[Wed Feb 19 20:02:15 2003]00482:Starting char select.
[Wed Feb 19 20:02:15 2003]00483:Clearing display buffers.
[Wed Feb 19 20:02:15 2003]00484

isplay buffers cleared.
[Wed Feb 19 20:02:58 2003]00485

isconnect in ProcessMBox. fin = 0, connected = 0.
[Wed Feb 19 20:02:58 2003]00486:Character name is .
[Wed Feb 19 20:02:58 2003]00487:disconnected at C:\EverQuest\EverQuest\EverQuest.cpp:20507 (char. select) g_world is NULL
[Wed Feb 19 20:02:58 2003]00488:Character is .
[Wed Feb 19 20:02:58 2003]00489:YOU HAVE BEEN DISCONNECTED.
[Wed Feb 19 20:02:58 2003]00490:
end of DisplayScreen