Well the administrator thing can be easily fixed , just change it to something shorter like Owner.
Also check if you're matchserver shows any errors , if it does post it here
if my matchserver was error....how can i get into the game...cant u think??..any other options??
Look in Source/GunZ/ZGame.cpp there's is a error, Go for it ;p
maybe the packet has been modified but the packet definition was not changed to support the new parameters thus the packet gets dropped maybe but its normally easier stuff then that but i cba to waste time to look as i have never had this issue its something you have done or something you have leeched