msn messenger ok in lan but doesn´t access wan.....???

From: dscelza (dscelza_at_adinet.com.uy)
Date: 04/30/04


Date: Thu, 29 Apr 2004 18:06:01 -0700

SCENARIO: 2 winme & 4 xpsp1 sharing IC through an xpsp1 with 2 NIC and a 3Com switch. ADSL dyn IP 256k.
MSN voice comm. works fine within the lan but when you go to the wan you can only use text chat ***and video*** but no voice.
I`ve got the same problem using 2003 server instead of the XP for IC
Anybody accepting this challenge?????