problem with fglX11d

Hy to everybody,
 
we have a problem in 4js execution time on interface X11. We have installed
4js X11s on client Linux Suse 9 named  (nbook) while the environment 4js is
installed on another server Linux Suse 9 called (Suse).    
 
We have set on client the followings evironment variables:    
TCL_LIBRARY=/usr/local/lib/tcl    
TK_LIBRARY=/usr/local/lib/tk    
PATH=/usr/local/bin:$PATH    
 
on the server we have setting the followings environment variables:    
DISPLAY=nbook:0    
FGLSERVER=nbook:1 &    
FGLGUI=1    
    
when we execute from the server "suse" the command fglX11d - n 1 &    
we get the following error:     
Application initialization failed: this isn't to Tk applicationcouldn't
connect to display "nbook:0"    
Communication between daemon and interface manager has broken down.   
    
Do you think I am doing something wrong?
Thanks for the attentions and best regards to everybody  
 
  Lucio Moreschi