Try forwarding these ports and try again:
-Port 5000 open for UDP.
-Port 6100 open for UDP.
Warning: These expose your ports to the internet, thusly allowing communication between programs. You understand that opening these ports is your own decision and I/eGO am/are not responsible for any type of damage that probably won't, but still has the chance to occur.
If it does not fix your problem, please let me know.
Before doing that please either uninstall Ventrilo and reinstall it or confirm you've done this already.
So far I've ruled out any complications between you and eGO because I run the same OS and I am not having a problem nor did I have to forward any ports to connect, either.
My job is to figure out where the problem is.
Detailed information is helpful, too.
Hope it helps,
Ric.