Ok, some of what I say will have been repeated in the comments already written, but I'll try to come up with a few original points and go into a little more detail.
I think the main problem that limited this image's rating was that you didn't really have much in the photograph itself for the viewer to look at. About 80% of it is just a plain sky. The photo itself is a good one and is nice to look at at first, but once you've got over the couple of millimetres of lights at the base of the image, and the slightly distracting street light, there isn't much of a reason to continue to observe your picture. I think that perhaps a few more subjects and maybe less sky would have done the trick.
In terms of technical elements and your use of your camera, the photograph is sound and your choices for low aperture and long shutter speed certainly paid off, however what remains are those layers of colour that are scattered throughout the sky. This graininess and colour blocking is usually the result of a digital camera trying to overcompensate for dark conditions and this is always made worse by pointing it at a direct source of light which confuses the inner processors. However, from what I've seen of the other entries for this competition, this image certainly remains one of the better ones, so I'm surprised that it didn't achieve a higher place.
Overall, I'd say that your ability to take such landscape images is fine although after a quick look over your past entries, it certainly looks as though you specialise in those great macro shots.
This is one of those photos that could have been top 15 with a couple of changes. Some suggestions:
1. Consider finding a way to fram the image without the street light. For me, it's a bit distracting.
2. The horizon is a bit low, I would have raised it and gotten less sky.
3. Consider playing with the shadows/highlights if you have PS CS2. Also, consider playing with curves and levels to bring out the clouds in the sky.
I know people always ask for critiques; I'm not a great photographer, so take these thoughts with a grain of salt, but I hope they're useful!