Try $response->_DUMP to get the content of the output object.

You can also look up the class' doc: "perldoc MyElements::fsPublic_SQLOutput" Maybe there just is no content, or it has text content which you can access via ->value();

If there's nothing, but should be, try passing the option "outputxml => 1" to the constructor of the interface class - it should return XML then instead of a response object.

Martin