Steam Voice Chat - Not Working

A group of us all chat fine in the game -- again I said IN GAME.



However, In a private group chat something goes wrong.



Example: 4 people in the chat. I can easily voice chat with 3 out of the 4 members. Only one person that I cannot voice chat with -- you see the spinning icon next to their nickname, and then it turns to a a RED LINE going through their speaker.



This does this with me only. Others in that chat do NOT see the red line and they can hear that person just fine. It is not a setting on either of our ends as our microphones work fine with other people. Neither of us banned each other. It just seems that either my computer will not accept their connection for voice in private group chat or vice versa (we can chat in game though).



Can someone please give me some advice on how to fix this. NOTE: The person that I cannot voice chat with is using a Video Camera Microphone. But remember this person does NOT have an issue chatting with the other three members using that device in that group... its only with me!



I am not the only one that has posted about this issue (elsewhere on the steam, and other forums) so if you find the solution for us you'll certainly earn that red star sticker :)