Hello bro misteeq,
The problem you faced is unique.
Unfortunately, as far as I know, we don't have to do anything to the device settings. It pretty much like what I mentioned in the steps.
Have you tried to move the gpx file to \map\GPX directory? The GPX file is only a small size file.
If you still couldn't make it appear, maybe other brothers with better technical knowledge can jump in to help...
Still couldnt make it appear in my Trip Planner.. I've tried to move the .gpx to \map\GPX directory.
Last Tuesday, I did email to Garmin Malaysia/AECO Technologies regarding this issue. Their respond as below :
"For all new models such as the Nuvi 2465, you will not be able to plan your trip on Mapsource and transfer it to the device. You can only plan the trip on your device using the Trip Planner feature which is on the device"
But you guys here able to do it. And that makes me wonder. The main reason I bought this GPS is to use the custom route created in Mapsource and playback in the device. If I couldnt make it work, it'll be a waste..