Failed to start client (UDP) listener (port 9000)

[greneday]

I saw in the xml file a place to change the zone port range, but not for the actual 9000port for the eqemu world.exe I believe.
If I was smart in programming maybe I could grab the source and change it there, then compile world.exe?
I do not know much about this but, under source 0.7.0, world folder, net file, there is a line
EQStreamFactory eqsf(WorldStream,9000);