Create a Phot Gallery tutorial

Hi everyone.
I’m having a bit of trouble with the above tutorial on this site. Am I right in saying that at the point where you first copy and paste the script, that suprabeener has written, onto the empy keyframe of your new layer - the gallery should work when previewed?
I try this you see, but just get an empty screen. My movie is located in the same folder as the images folder.

I know this may sound a bit vague, but does anyone have any ideas as to where I might be going wrong??

By the way, I’ve found all the other tutorials on here really useful and I think I must have just missed something here!

Thank you.