Battery Dead. One Head Lamp Left On. Help!

[GlennSheridan]

Just went out to my 2005 X5 4.8is and discovered the battery was dead.

I tried to put it in neutral and push it out of the driveway to jump it with my wifes car. I decided against that and instead decided to move the wifes car next to the X. While the car was still in neutral I tried to remove the key and the instrument cluster showed something in what looked like a different language. I then proceeded to try to jump start the X5.

After leaving the vehicle idleing for a few minutes I tried to start the X5 but nothing happened. All the instrument lights were off and it was making a chirping sound. The key fob doesn't lock the doors anymore. Did I set off the anti-theft mode? Will resetting the battery cure my X?

TIA