Hi I'm new here and have had my Go for about 7 months. I recently updated to map 830.2284 and App 8.351 and now I am unable to use any voices at all computer voice or regular without street names. I have the map and app saved on a Sandisk HDSC 8GB card. I can however unplug the card and use the old map that is saved on the harddrive of the 720 to access voices and spoken street names. Any suggestions. Thanks Jason