OK, super-stupid question, but mine aren't working correctly...

1. Place a Map Marker

2. Attach it to an x-Marker/x-marker heading

3. Add Marker Data (Name/Type)

4. Make Visible/Travel to

5. Doesn't work correctly?

My Map Marker shows up, and can be found just like any other, but attempting to fast travel to it does not work; if I use a script, it bounces me back to wherever I was originally, and if I use the Map Menu, the game just freezes on loading, and eventually goes into "Not Responding" mode/an error shut the program down mode.

As far as I can tell, my map Marker is exactly the same as any other; I've compared it to others, and gone through the menu piece by piece, and can't see anything different except the name of the Marker, (originally the Make Visible/Travel to, but I took those out), and yet it is still not working.

does anyone have any ideas?

Have you tried without linking it to the marker? Sounds like you've done it exactly right. That's how I set mine up, but try it anyway.