I have read through many threads on iChat AV and NAT, but cannot get my Netgear wgr614v6 router to pass iChat AV. My son has the Netgear wgr614v7 and it works fine. When I bypass the router and go directly into the cable modem, I can iCHat AV with my son. I turned all firewalls off, but still no luck. Any ideas?