How set up and how use voice dial ? Nothing working.

Am I supposed to have some setting done on the google contact website ?
Is there some setting on the phone that I need to do ?

Here's what the HTC site says:
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From the Dialer screen

From the Home screen, tap the Phone icon.
Tap on the microphone icon on the bottom-right part of the virtual device keypad.

When prompted to Speak now, speak your command (ex. <call> <amy><mobile>). If prompted, tap the correct option.
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I saved my home ph. # under "dog".
I tap the phone icon.
I tap the microphone icon.

I say "call dog"
and I get a "voice search" list of "call dog; call dogs; call dawg", etc.
I select "call dog".
I select "call".
I get and "unknown" and "call has been lost"


What am I missing?
Can anyone offer some info on voice dialing on this EVO4GLte ?
Thanks.