MSN Messenger 6.2 audio/video requirements:
1. The modem/router must be UPnP compatible. Set Zone Alarm to medium or
shutdown, but if you are proficient with the settings, allow MSN Messenger
6.2 access to the Internet.
2. On the Network Connections, right click Local Area Connection, go to
Properties, and the General tab should show a check mark only on Client for
Microsoft Network, and Internet Protocol (TCP/IP). No check on File and
Printer Sharing for Microsoft Networks, nor on QoS Packet Scheduler.
3. The Windows Firewall should be ON (recommended) and no check in Don't
allow exceptions . The Exceptions tab will later show the MSN Messenger 6.2
and UPnP Framework as being active.
4. In the Control Panel > Add Remove Programs > Add Remove Windows
Components, scroll to Networking Services and remove all checks, except for
Internet Gateway Device Discovery, and for UPnP User Interface. Click Ok,
Next and the Windows Wizard Component will run. Click Finish; now the UPnP
will automatically open all required ports.
5. Sign in on Messenger and run Audio/Video Tuning Wizard. In the Tools >
Options > Connection tab, you should read You are connected to the Internet
through a UPnP symmetric NAT. (Administrator). If you now check the Windows
Firewall Exceptions list, the MSN Messenger 6.2 and UPnP Framework have a
check mark and the required ports are open.
6. Both Windows XP users sides should have similar setups with working
webcam and microphone.
Hope this will help, it has with many people.
I made item 1 more specific. Your modem/router MUST BE UPnP COMPATIBLE and
have this feature enabled for the above instructions to work; if not UPnP,
ask the manufacturer how to open the required MSN Messenger 6.2 audio/video
ports.