Shoutbox

Hi.
I was trying to have a voice conversation with my mate butr evrytime me or him requested it it said:
Your computer, Internet provider, or network may not support Voice Conversations or video conferences.
Why? It always worked before

maybe your isp has blocked the voice ports! for msn, try to check it over yahoo!, here in lebanon for example it's common that voice is blocked over msn, but it works on yahoo.