Captions won't show under image

Hi,

I'm new to this whole thing, so please excuse me if this is a dumb question, but I just can't seem to the get the captions to show up under my images. When I insert the images, I am definitely entering a caption, description, etc. My Atahualpa theme options also show that the caption should be displaying. But, they just won't display. Take a look at the images in any of my posts: http://www.green-vine.com Does anybody know why this might be? I really appreciate your help...thanks!