Salome_7.4.0 Installation Problem on linux

Hi,
I try to install Salome_7.4.0 64bits on linux. I error message come when i do the last step ./runSalome . Please help me to resolve this problem. Thanks a lot

[root@cudak4 bin]# ./runSalome
runSalome running on cudak4
Searching for a free port for naming service: 2810 2811 - OK
Searching Naming Service ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++Failed to narrow the root naming context
Traceback (most recent call last):
File "/home/tristan/salome_7.4.0/SALOME_7.4.0/bin/salome/runSalome.py", line 677, in useSalome
clt = startSalome(args, modules_list, modules_root_dir)
File "/home/tristan/salome_7.4.0/SALOME_7.4.0/bin/salome/runSalome.py", line 447, in startSalome
clt=orbmodule.client(args)
File "/home/tristan/salome_7.4.0/SALOME_7.4.0/bin/salome/orbmodule.py", line 47, in __init__
self.initNS(args or {})
File "/home/tristan/salome_7.4.0/SALOME_7.4.0/bin/salome/orbmodule.py", line 86, in initNS
sys.exit(1)
SystemExit: 1


--- Error during Salome launch ---