Hey all, having issues with our VS-4000. it seems like after we updated our talkback function has stopped working for the operator. we are plugged into the correct ports in the back of the device and we are fairly sure the headset/mic is working and the correct settings are selected both in windows and in the Newtek program, But during a call we get nothing from the headset when the talk button is pressed and when you open the settings you don't even see the bars jumping that it is pickup up the mic. Anyone else having an issue with this?