[Ekiga-list] problem in configuration page of ekiga

[Prakash B]

thanks for guidelines ,so that i installed ekiga, i am now in configuring
page of ekiga. (working in Fedora 5).
  In 5/10th of configuation page i am getting error as

   "The Detection of your NAT type finished
   STUN test result: Blocked.
   Ekiga could not detect the type of NAT you are using....
   ...Please make sure you are not running a local fire wall."

this is the error for whatever be the setting in 4/10th page.

   thank for your comments.