ORDERBY, ORDER not working

Hey guys. I hope you can help me.

I cant get any sort order of my terms get working.

I tried orderby name, id, title, date;
I tried ASC and DESC.

Nothing seems to work, I just get the standart name asc.

I used this code, as descripbed in the documentation:

function my_qmt_base_url( $base ) {

	$additional_args = array(
			'orderby' => 'name',
			'order' => 'desc',
		);

		$base = 'MYURL';
		return add_query_arg( $additional_args, $base );

}
add_filter( 'qmt_base_url', 'my_qmt_base_url' );

Thanks a lot.
Stefan

http://wordpress.org/extend/plugins/query-multiple-taxonomies/