i a m trying to change the privacy settings to disable using method vimeo.videos.setPrivacy

i use below code
$vimeo = new phpVimeo('myconsumer_key', 'myconsumer_secret','token','token_secret');

$info = $vimeo->call('vimeo.videos.setPrivacy', array('video_id' =>$videoid,'privacy'=>'disable','users'=>$username,'password'=>""));

but a "not alowed" error occours when i call this

below is my response
stdClass Object
(
[generated_in] => 0.0118
[stat] => fail
[err] => stdClass Object
(
[code] => 95
[expl] => The user is not allowed to perform that action.
[msg] => Not allowed
)

)