Sandbox Account get Call Recordings - php sdk

I have sandbox account working. I want to get call recordings.

$platform->get('/account/~/extension/~/call-log', array(                               'type'          => 'Voice',                               'withRecording' => 'True',                               'dateFrom'      => '2016-01-01',                               'dateTo'        => '2016-02-16'))                             ->json()->records;

this line of code returning empty array. I am testing with https://github.com/ringcentral/ringcentral-php