from what it sounds like, you just might have it right between the R and N. remember you dont need to press the shifter button to shift from R to N.
Ive taken apart my shifter indicator plate, and the flourescent thing moves when the shifter is moved up or down, it just might not be moved down enough to match up to show in the space where N is.
see on mine, there isnt even an indicator? thats because the mark is between the P and R spaces, so they dont match up and show it. long story on how this happened.
hopefully that made some sense, but basically i think you should be fine.