This is a great photo and definately fits the Bokeh challenge. The colour and contrast are in my opinion spot on, but I see one major flaw which I think stopped you scoring higher.
Lens Flare.
Whilst it is true that the bright orange glow adds impact to the photo, the green and blue flares on the crisp silhouette of the branch do not. Under advanced editing rules it would be perfectly legal to use the clone tool to remove these and enhance the overall appeal of the photo. Also, the orange streaks on the branch should also be cloned out in my opinion. It is enough for the light to overcove the branch shapes in the bokeh, as that creates a good enough mood, without them obscuring the main focal point of the photo.
Composition-wise this is pretty good. I think maybe moving the branch up or down in the frame slightly would help, bringing it a bit more off centre, but it doesn't matter all that much in this case.
The short definition of Bokeh from KenRockwell.com, which I am using for voting on this challenge: "Bokeh describes the rendition of out-of-focus points of light." Check. Is the subject enhanced by the bokeh of the background? Check. Very lovely photo.