Brad,

You are using a 510 headset. Are you holding the button down until it beeps twice? The way this works is you hit the button and hear the high beep. Then keep holding it until you hear a low beep, and let go. Sometimes you have to do this twice, but after the low beep voice command should play the listening prompt.

To all: Handango just sent me a note indicating that 1.5 and 1.6 had the same product codes this morning which was why entering email addresses didn't work reliably. Supposedly they've fixed it now; thanks to all who wrote in. Enough of us did that so that they figured out what was going on.