I can reproduce it. It want load "Loading..." (which comes from the loading screen) instead of the right map. It's not a problem with the demo file.
===== Paintball II Initialized =====
Creating DS buffers.
...using secondary sound buffer.
70.85.9.178:27900: vninitresponse
70.85.9.178:27900: vnresponse
GL_FindImage: Can't load pics/mapshots/.
-------------------------
52 CMDlist entrys found.
-------------------------
==== PB2 InitGame ====
autojoin on, normal
=== Rotation Init ===
13 maps added to rotation.
Global login disabled.
------- Server Initialization -------
********************
ERROR: Couldn't load maps/Loading....bsp.
********************
==== ShutdownGame ====