Phone mutes for 3rd party app

I have the HTC Incredible 2. For apps like Tango or vonage the phone becomes muted. I did use vonage before I rooted using Cyanogen mod 7.2. I have done numerous resets but nothing helps. As for making voice calls it behaves as normal and does not mute. When I use an app such as tango, there is a button to press that would mute the conversation but when I press it toggle it - nothing happens. I have Cyanogen with AVD launcher if that helps. Any help is appreciated.