etlsport and ojmagg, it ended up being the factory tailgate switch itself. If you hook the output from the factory switch into the new five post relay per Raque's instructions the switch allows enough voltage to pass through (verified by my volt meter), but it must not allow enough amperage through to trigger the solenoid at the tail gate.
I am no electrical guy AT ALL, so it took me a little while, and some reading up on how/what a relay does, to work through this. Right now my stock release button is wired through a four post relay, and from what I am finding out when you press the button a small current goes to the relay and "trips" it allowing a higher current to pass through the other side of the relay and triggering the solenoid. What I finally figured out was that I needed to wire the high current output from the four post relay (which would normally go back to the solenoid) into the input from the release button in the new five post relay on Raque's diagram. I'm sure that's not confusing at all. 
I would be happy to draw up the new wiring diagram and post it up or send it to anyone who would like to try this. I'd also be happy to talk anyone through it. Just shoot me a pm with a phone number and we'll have a popper party.
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