Middle rear brake light replacement on 2005 Nissan Armada

Can't seem to be able to get the middle lense cover (above my tailgate) off the back of Armada to replace a light bulb.

1 answer 1 comment
The link below explains how to access the 3rd (high mount) brake light. The manual says it does not have serviceable bulbs I'm afraid.

Here's a link to the factory manual. The information on the brake lamps are in "LT" and the "fwd" is the contents.
http://www.nicoclub.com/FSM/armada/2005_Armada/

Here's another link to a Nissan parts site, it shows the light as an assembly... about 84 bucks
http://bit.ly/YMJmk
hope this helps!
This instructions are very vague. The cover is not easy to take off, I haven't been able to do it. It just says to take it off, it doesn't say how!!!