DBFM - Reports "Drupal.behaviors has no properties"

Hey guys,

I'm having some problems getting DBFM 5.x-3.3 up and running. After successfully creating directories, when I choose to edit their properties, the background loads up on the grey backdrop, but the background is empty except for an empty box with the header "Directory properties: X", where X is the ID of the directory. As per the title, Firefox's error console gives the javascript error: "Drupal.behaviors has no properties".

I'm currently using Drupal 5.7, and I have installed the following supporting modules for DBFM: dapi 5.x-1.0, dbfmgreybox 5.x-3.0, and jstools 5.x-0.6. I've also tried with jstools most recent version to no avail. Lastly, to try to rule out other module interactions, I put up a fresh install of Drupal 5.7 and installed only the required modules and ran into the same error.

I'm pretty much at a loss since I've been unable to find much on the problem (other than upgrading to the latest version of jstools, which predictably breaks DBFM elsewhere since it's not the version DBFM is designed for). Any help anyone can provide will be massively appreciated since this module looks quite solid from the demo-ing.

Thanks!