Gordon has a tutorial on this. If you haven't watched it already I urge you to do so here:
Or here: http://www.dslrtips.com/workshops/How_t ... hoto.shtml
I think you are doing it wrong.
First of all I have never done these kind of photos but i'll share my views on it anyway:
You say you zoom from telephoto to wide angle. This would create all sorts of distortions as the field of view would be changing as so would be the perspective making the picture look 100% out of focus.
I also think your shutter speed is too low.
Try 1/125 of a second.