jerry@raphael ~ $ /usr/NX/bin/nxagent :1
Couldn't open RGB_DB '/usr/X11R6/lib/X11/rgb'

NXAGENT - Version 1.5.0

See http://www.2x.com/ for more information.

Info: Agent running with pid '19714'.
nxagentProcessOptionsFile: Option file is [(null)].
Info: Using fast copy area mode in agent.
Info: Using fast get image mode in agent.
Warning: Render not available on the remote display.
Info: Using image cleanup parameters 0/0/0/0.
X Error:  BadWindow
  Request Major code 2 ()
  ResourceID 0x0
  Error Serial #397

Info: No window manager has been detected.
nxagentOpenScreen: No window manager is running, forcing fullscreen mode.
Segmentation fault