Image text wrapping problem within integrated theme

It has taken me sometime (as a complete novice), but finally I have managed to integrate WP into my own website.

All was looking good until I tried inserting an image into a post, as you can see the text will not wrap….

http://adcurata-outplacement.com/media/?p=155

I have tried all the various methods described in other posts, including the plugin ‘Image Pro’ with absolutely no luck.

I am unsure (with my limited knowledge) if it is my site .css that is causing the problem or the Twenty Ten (adjusted) version.

Any help would really be appreciated.