Privet.
Naskolko ya ponimaju, eto problemma NAT. T.e. snaruji pitajutsya podkliuchatsya na porti, uzaemie ICQ.
Wot tablichka portow, gde est ICQ conferencing... Esli SUA (forwarding) ukazannih portow ne pomojet - to beri Iris ili drugoi snifak i smotri, kak eto ustroenno.
http://www.misstique.nl/winr.php