codec problem!

Hi.

on mi blog i have this problem. when click on the gallery, my blog open another page(i dont know its a page or another kind of archive) to visulize the image.
in this page the code report this error. \wp-content\plugins\hover-pin-it\hover-pin-it.php on line 52

my blog is: http://www.modela3d.com

http://wordpress.org/extend/plugins/hover-pin-it/