I just bought a newer Navigation CD for my RL. However, it doesn't work. Is there a step I am missing or something? Would appreciate any help I can get.

 

If you have an '05 RL, you cant update the Nav directly using v.4.62 or above disc. You have to do an update first using v.4.55 or v.4.31, and then install the 4.62 or above. Do a search in the audio section. There are lots of recent posts about this.