通过cron-job创建facebook事件

我想通过cron-job创建facebook活动.应该代表已经授予离线访问权限的facebook-connect-site用户创建事件.我有session_keys没有过期,但无法让它工作!代表我的应用创建活动就像一个魅力,只是不是我想要的...

var_dump($event) with some randomly generated data:
'name' => string 'Try a athirst these and' (length=23)
'tagline' => string 'as it that he down the almost the' (length=33)
'description' => string 'that deeper but is sea whenever lead all a stream knowing robust bakehouses attending have am it pent for own quick' (length=115)
'category' => int 5
'subcategory' => int 52
'location' => string 'same as more the' (length=16)
'start_time' => int 1263630600
'end_time' => int 1263654000
'street' => string 'This Was Ships My 807' (length=21)
'phone' => string '49 692 324' (length=10)
'email' => string 'oeott@yahoo.com' (length=15)
'privacy_type' => string 'OPEN' (length=4)

api_client->session_key = '5de03e54cb359f9asf3435365e-4588985454';
$eid = $facebook->api_client->events_create(json_encode($event));

?>

结果:"异常'FacebookRestClientException',消息'无效参数'"

有人能在那里拯救我的一天吗？