MSN voice char with h323-conntrack-nat is not working

[Sundaram Ramasamy]

Hi,   I have compiled my kernel 2.4.18 with newnat13. Then I did the following URL steps.  But still MSN voice chat is not working   http://www.aboutbillbell.com/ContentPage.jsp?content_page_id=44     Do I need to forward any port number ?   Port         Description    389          Internet Locator Server (TCP)    522          User Location Server (TCP)    1503                 T.120 Protocol (TCP)    1720         H.323 (H.225 call setup, TCP)    1731         Audio call control (TCP)    Dynamic              H.245 call control (TCP)    Dynamic              RTCP/RTP streaming (UDP)    I have to network card  eth0 is public address( 205.133.76.140) eth1 is internal address 192.168.1.48   My MSN message machine address is 192.168.1.6   Any pointer or sample script for this.    Thanks -SR