It appears that your error might be due to a typo in /etc/omniORB.cfg. In your example you use "InetRef" when it should be "InitRef".
Double check the settings and then restart omniNames and omniEvents and try nameclt again. If you get an error such as this:
$ nameclt list
Caught a TRANSIENT exception when trying to validate the type of the
NamingContext. Is the naming service running?
Double check that omniNames is indeed running (i.e. ps -ef | grep omniNames).