my brother and i both have macbooks - i'm away at college and he is at home and we are trying to videochat on ichat with the isight. when i try to connect with him an error message comes up that says that there is a problem occurring on his end and when he tries to connect with me, an error message comes up on his computer that says there isn't enough bandwidth to support it? he went under ichat prefs, then under video and his bandwidth limit is set to none. can anyone help?