I get the same problem as yellowpunk..
This is a mystery to me. Without looking at your files, and possibly your installation, I simply don't have a clue. I wonder if you (and others) are installing the latest version and checking the relevant thread over at punres, where all the work for this mod is taking place?
If you wish, if you click on my profile and send me a note with your email address, I will reply so you can then send me attachments of your gallery install files so I can look at them and give you more feedback. Please ut PBB Gallery in the subject line.
Love is the Function
No Form is the Tool