Map Update One Time

Howdy,
Recently bought and am using a Nuvi 755T.
Worked great over a 3 week 2750k EU trip.
Now back in TX.
Got my nuMaps Onetime update cd for NA NT 2010 via USPS.
This update is supposed to take me to NA NT 2010.20 from NA NT 2010.10
Unfortunately I keep getting this (-- garmin gps not eligible --
previous map version not installed.) on a screen when I try to do the
update as per the cd install update steps. When I acknowledge the
message the installer closes without installing the update to my
garmin unit. From the same cd I had no problem installing the updated
NA maps for use with Map Source.
I searched the garmin knowledge base and found no clue as to what I've
over looked. Everything seems to be working fine. Map Source is
A-OK. The latest garmin online communicator is installed. I can
upload and download to the 755T from Map Source. I have an SD card
and I'm able to view that content (grand kids photos) with no problem.
Currently my Nuvi 755T has NA NT 2010.10, and I have been using it
over the past few weeks in and around Dallas/Ft. Worth.
Thanx in advance for advice.
Pete

I assume that you've purchased (or received with the unit) and original CN NA
NT for that unit. If not, it won't update regardless of whether you have an
original of some other map set.
--
Carl Heinz
cfheinz57@charter.net
(Remove number)

why even bother ? when you are already on the latest ?

When you ordered, you had to supply the serial number of the 755T,
and the new DVD will probably be locked to that specific unit ?
BTW - you mention it's a CD, but all my maps came on DVD ?
Can you tell it's the 2010.20 version DVD vs what you already have installed
?

hmmm - where is the current NA map image installed - on the SD card, or in
the 755 memory ?
The upgrade might only be looking at the memory of the GPS ?

Is the clue - "Worked great over a 3 week 2750k EU trip."

What map were you using there? Is it still loaded? Were you using NA &
EU combined?

wrote:

I was wondering whether he'd purchased the "original" EU and hadn't purchased
an original NA.

A quick check for him would be to check his my.garmin account and see which
updates were available--and to see whether it reflected an original NA.
--
Carl Heinz
cfheinz57@charter.net
(Remove number)