Actually, it looks like this is a problem with the extensions, not the folder. You'll see that your first image has an extension of 'JPG', but the other has 'jpg'. If you'll look in your forum/admincp/vba_gallery_admin.php file for this code:
Code:
Content visible to verified customers only.
Replace it with this:
Code:
Content visible to verified customers only.
Then turn your .htaccess protection off and then back on again (to update the file) then that should take care of the problem.