Amazon Product in a Post Plugin crashes my in post image gallery

Hi there, Amazon Product in a Post Plugin crashes my in post image gallery after activation. gallery plugin is called simplest gallery. so if u have any ideas how it can be fixed plz respond.

Here are some images:
Before activation: http://i43.tinypic.com/b8sdbt.jpg
After activation: http://i42.tinypic.com/2j4tv2v.jpg

my website http://mikspace.com

http://wordpress.org/plugins/amazon-product-in-a-post-plugin/