Feb 4th, 2005
I was away for awhile and I am sorry for being late at answering your questions.
If you have a software firewall alongside the router, make sure you give server permission to MSN/Yahoo in your software firewall.
If you can also tell me which firewall you are using I can assist you with setting that up.
Sometimes you can't hear audio because of the other person blocking outgoing audio to you. It is not an easy to troubleshoot if both parties have firewalls and it is not always your side that is not working.
Hope to hear from you soon.

