Help to define parent at the time of addtion of queue

parent definition for a queue using PHP api is not working for MikroTik RouterOS 6.0rc11
i am currently using Denis Basta’s PHP api class

and my add queue code is

$ARRAY = $this->api_model->comm("/queue/simple/add", array(
                          "name"     => $somedata['name'],
                          "parent"=>$parent_name,
                          "target-addresses"     => $ips,
                          "max-limit"=>$somedata['rx_max_limit']."/".$somedata['tx_max_limit'],
                          
                     ));

which is not working for MikroTik RouterOS 6.0rc11(firmware version 3.04)
but worked for older version…
my problem is the parent parameter in above code does not make any response
the parameter “parent” in above code does not made any sense and change to newer version mtik router

problem solved