Media Gallery Settings

Hi –

I wanted to create a Gallery on my WordPress site using the media uploaded. I was able to create the gallery, but it made my photos only as square thumbnails. I wanted all of the photo to show, not a cropped square thumbnail. . I tried following the directions that were in this post:

http://en.support.wordpress.com/images/gallery/

I am running WordPress 3.5 with the Photocrati theme installed.

What could be the problem ? Thanks,
The blog I need help with is http://www.michellekawka.com/blog.

The specific post is http://www.michellekawka.com/2013/01/studio-portrait-of-mariela/

THanks.