runs as root but not as users

Hello

I have installed Salome on a cluster with CentOS 64. I can run it as the root but when users run it, we get this error message:

[iman@nami Figs]$ runSalome
runSalome running on nami.eng.buffalo.edu
Searching for a free port for naming service: 2810 2811 2812 2813 2814 2815 2816 - OK
Traceback (most recent call last):
  File "/share/apps/software/x86_64/salome_6.4.0/KERNEL_6.4.0/bin/salome/runSalome.py", line 1020, in <module>
    clt,args = main()
  File "/share/apps/software/x86_64/salome_6.4.0/KERNEL_6.4.0/bin/salome/runSalome.py", line 946, in main
    searchFreePort(args, save_config)
  File "/share/apps/software/x86_64/salome_6.4.0/KERNEL_6.4.0/bin/salome/runSalome.py", line 876, in searchFreePort
    f = open(omniorb_config, "w")
IOError: [Errno 13] Permission denied: '/home/iman/.omniORB_nami_2816.cfg'
[iman@nami Figs]$ 

How can we solve this?