[Plugin: Gallery Objects] can't add pictures or change settings

in wp 3.1 / firefox 3.6.15 i can see the plugin-admin-site and create an album and views but i cannot see any pictures (using the add button does nothing) or change color / effect settings.

my wp installation is currently in a subsubfolder, is that a problem?
edit: i put the wp installation in a subfolder but that didn’t help neither.