Dodge Ram Coolant Leak. Here's (pic) where, how do I fix it?

My 2004 Dodge Ram, 5.7 Hemi, has been leaking coolant the last few days. I left it outside one day, and the temperature dropped to the low '20's and when I woke up the next day, my truck had leaked coolant all over the driveway.

I put my truck in the garage for a few days, and it stopped leaking. When I put it back outside, it started leaking again.

Best I can figure, the leak is coming from here (red circle around the problem): http://imgur.com/ga8XL.jpg
and here is another pic zoomed in: http://imgur.com/9h7d7.jpg

It's the 2 1/2 inch hose that runs from the radiator to the engine. The part where the hose connects to the engine is the leak area. Do I need to just tighten up the connection? Or what?

The fluid is coming out at the connection spot.

I stopped by a name store and they suggested it was a thermostat issue. Just wanted some other opinions before I jumped in and changed the thermostat.

Thanks.
 
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