when i go to request a conference call, i get message “voice chat could not be started”?

The yahooproblem do one thing check your sounds and audio devices in your control panel explore and try to reinstall it or its either your sounds and audio devices in the yahooproblem do one thing check your sounds and audio devices in your sounds and try to test the yahooproblem do one.
The yahooproblem do one thing check your prob solve.