Hi guys!
I tried the instructions to enable the JCV,LA features on my Nuvi 1200!

At the beginning in my gps was installed the 5.20 FW version, I tried the SD (the 6.20 version) method to unlock...but without success.
I read better the instruction :D (it was my fault, I know) and I updated first the gps to the 6.20 version (with the Garmin webupdater tool)
The updates were fine, I tried again the SD method and this time on the screen was displayed: "Update Loading...." at the end It seemed that all was ok!
I put the map on the SD: Europe 2014.20 (in SD:\Map\ as usual) and the JCV file (D2504140A) in the .System/JCV folder.
Nothing happened!

After I followed the "standard" procedure presents in the first page and the update was ok!
But at the end, the JCV features continue to don't work!!
What am I wrong?
How can I verify that the features have been unlocked?
I read the file GarminDevice.xml and this xml nodes are displayed:

<DataType>
<Name>LaneAssist</Name>
<File>
<Specification>
<Identifier>JCV</Identifier>
</Specification>
<Location>
<Path>.System/JCV</Path>
<FileExtension>jcv</FileExtension>
</Location>
<TransferDirection>InputOutput</TransferDirection>
</File>
</DataType>

So I believe that the features are enable!

Thank you for the help!
Have a nice day