2005 4.4 won't crank after battery replacement

[e53sg]

Here is the scenario:

I ran out of gas, and during the course of being on the side of the road with the hazards on for 4-5 hours the battery discharged.

Since I just bought the X5 6 months ago, I didn't know how old the battery was so I purchased a new one, and installed it.

When I connected the battery the alarm went off which I disarmed with the key fob.

Now when I try to start the X5, I see Code displayed on the dash, and the alarm goes off if I attempt to start. It will not even crank.

I have disarmed the alarm with the key fob as well as locked and unlocked the drivers door manually several times.

I know I'm missing something easy here.

Any assistance would be greatly appreciated.