When I execute the command %F
 

When I execute the command
%FoamX gives an Error
$ FoamX
Starting NameServer with inet:pc4989:1234 ...
Starting FoamX Host Browser with inet:pc4989:1234 ...
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.4 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

Exec : FoamXHostBrowser
Date : May 15 2007
Time : 15:05:03
Host : pc4989
PID : 4765
Root :
Case :
Nprocs : 1
Caught FoamXError exception in FoamXHostBrowser::main(int argc, char **argv) :
FoamXError "Unexpected error"
In function "FoamX::NameServer::connect(CORBA:http://www.cfd-online.com/OpenFOAM_D...part/proud.gifRB_ptr pOrb)"
in file "NameServer.C" at line 220
Finishing FoamXHostBrowser::main(int argc, char **argv)
runFoamXHB : cleanup
runFoamXHB: Name server is not running.
/home/l_kumar/OpenFOAM/OpenFOAM-1.4/bin/runFoamXHB: line 135: 4760 Killed nsd -ORBIIOPAddr $myIOP --ior $FOAMX_CONFIG/ns.ref </dev/null

I will very much appreciate your help