Cannot get MoPics to work. The problem is that when I click on the second thumbnail the first Big picture opens up by default. It also does this for any other additional thumbnail. It always opens up the first one.

My thumbnails are in /thumbs/ as follows
abc.gif
abc_pic1.gif
abc_pic2.gif
etc

My big pictures are in /images_big/ as follows
abc_big.gif
abc1_big.gif
abc2_big.gif
etc

Any clue why this might happen?