Keep getting the dreaded "Enter a valid callback method," though I uploaded it all fine before we switched which server our install was on. I even customized it to our own needs and it went fine, but now all I get (even when using your original file and placing it in the file structure same as you) is "Enter a valid callback method." Puzzled, but I'm no coding genius (aside from finding missing <?php tags when prodded) so I could be screwing something up that I'm not even aware of.