Are there issues regarding the use of ichat with an airport connection? My sister-in-law and I have been trying to establish a connection, but haven't been successful. I have an iMac (lampshade series), and she has a 14-inch iBook. Both are running the latest version of Tiger with isight cameras.

When she calls me, I get the ring, I click on acceptance, but the connection isn't completed. I get a non-response error message. We're both using high-speed RoadRunner connections. We can exchange text messages, but no audio or video. We both have AIM addresses/accounts.

Any help or advice would be deeply appreciated. Thank-you!