Voice Command Problem Garmin Nuvi 760 and Samsung Gleam

I just got a new Samsung Gleam from Verizon Wireless. Here's the
problem...When I use Voice Dial with the Garmin, I receive
confirmation that says, for example, "Did you say Call John Work".
BUT here's the problem...the person's name I'm calling is NOT heard on
the Garmin but instead heard on the Samsung Gleam's speaker...and the
sound is muffled...so I'm not sure the correct person is listed.

The result is this.

The Garmin confirms and says "Did you say Call"

Then the Samsung says in a muffled voice you can't understand "John"

Then the Garmin says "Work".

I've played with all of the settings on the Samsung Gleam and can't
this changed...and I had no problem with my old cell phone.

HELP!

Thanks,
Steve