HDR always turns out blurry

I don't have Photoshop.

I've tried the Canon Digital Photo Professional and the lightroom plugin Enfuse.  In any case even using the auto align the result always comes out blurry?  I tried using mirror lock up in case the camera was shaking during the multiple exposure shots but that didn't make a big difference.

Any thoughts?  The blur is just a general muddiness of the picture..