I just setup UM for the 1st time for this system. Licenses available. I used a GMail account. I am recieving the email with a WAV file attached. When I try to listen, I recieve a dialog box saying that the WAV file is formatted incorrectly. In the vm parameters the audio is set to dialogic 8K, I think I need to change it to PCM 8K, but don't know what ramifications this will have on existing greetings and messages. Any thoughts?