Voice chat from XMB disconnects me from PSN

Hi,
Whenever I try to do a voice chat with a friend from the XMB, after few seconds in the white room I get disconnected from the PSN. I searched and found some people with similar problem, but so far no solution, any help will be appreciated. And voice chat in PS Home and Killzone 2 works well.

It happens from time to time to me also. It sometimes helps to log off of the PSN and turn off your PS3 for a couple of seconds, before powering up and longing on again.

I lost my mic a month right after I bought it so I dont use voice chat.RTUUMM

i beat u
i lost my socom mic about 2 days after i got it....

If its on a specific thing, its a problem with your ports. Try port forwarding and what is your nat type. If your router is configured correctly, you should never be signed out. shabab12