Yes, I downloaded from viable. But still have problem............
Should I open firewall ??
I have no idea that viable develop xmeeting. should disable firewall.
You can contact Viable support to solve problem with firewall setting.
No, Viable does not develop Xmeeting, just provided a link to a website offering the open source app, Xmeeting.
Here's website for Xmeeting, XMeeting - Powerful Videoconferencing Solutions for Mac OS X
just that Viable is offering option for mac user to call other Viable users.
(also on apple's download page; Apple - Downloads - Internet Utilities - XMeeting but it is 0.3.4 version not 0.3.4a which is the latest one. So get it from Xmeeting website. )