I am 100% certain that my microphone is working because when I test it in the Microsoft Vista Control Panel/Sound/Recording the bars on the right side turn green. Also when I use VoIP, I have no trouble with the microphone. I am using Microsoft PowerPoint 2007 and when I go to Slide Show/Record Narration and the Record Narration box comes up. I then go to Set Microphone Level and the Microphone Check box comes up. And when I read the requested statement – nothing happens. No green bar appears as I speak into the microsphone. However if I unplug and then replug the USB microphone connection into the USB port, I do at that time see for a brief moment a green bar appear. I have also tried several different USB ports on my computer and nothing happens. I then still recorded onto my slides and saved the narration. In View/Normal on each of the slides I see the audio icon. However, when I try to double click on the audio icon or when I try to play the slide show, there is no sound. What might be happening? Help please! Larry_from_LA lschenker@gmail.com