Plug in dosen't display propertly

Hi i love your plug in but I can’t seam to get it to display properly on my web site http://farmfuckups.com/store/womens-hoodies/ I want the images to be 280px and the ablity to zoom in like my other store http://www.farmingapparel.com.
Thanks in advance for your help

http://wordpress.org/plugins/wp-spreadplugin/