OT? netmeeting behind gateway

Hi all, I'm not sure if this is OT, so apologize it it is. I'm trying to use M$ netmeeting from behind my Suse 6.4 gateway on teh home network, but cant' get the person I'lm calling on video. They can see me and hear me, but can't reach my pc runing w2k. Any ideas about giving the presise ip of the computer on a local home network to the person calling me as it were? They tried putting the pc name before the dynamic ip address the isp gives me, but that didn't work either. Any suggestions? -- Cheers Bruce