Linux trouble

[Immanuel Litzroth/i2Tech]

I tried to install the precompiled version of omniorb for linux but when I try 
to run
Omninames -start xxxxx
it tells me it cannot use this tcp port with the message
BOA_init failed: cannot use port xxx to accept incoming IIOP calls
I run this example as root. Do I need to have certain networking options
(tunneling or dummy netdriver ...) compiled in my kernel? Could anyone
give me some pointers on this problem?
Thanks
Immanuel Litzroth