Free NX [Error: Call to bind failed for font TCP port 11000]

Info: Proxy running in client mode with pid '98196'.

Session: Starting session at 'Mon Apr 30 18:22:52 2012'.

Warning: Connected to remote version 3.4.0 with local version 3.5.0.

Info: Connection with remote proxy completed.

Error: Call to bind failed for font TCP port 11000. Error is 112 'Address already in use'.

Session: Session terminated at 'Mon Apr 30 18:22:52 2012'.

This can happen if you have multiple NX connection to multiple machine.

sometime it can be due to the base display number. you can change that with

some other port. but make sure that port is not used by some other application.

 Or

Just start one connection at a time with nx client instead of multiple 

The setting is in the file # cat  /etc/nxserver/node.conf

# The base display number from which sessions are started.

#DISPLAY_BASE=1000

tar zcvf ~/ssh_freenx_config.tgz $(rpm -ql openssh-server freenx | grep etc)