something wrong in winRT

Oct 18, 2012 at 3:57 AM

 JObject b = (JObject)JsonConvert.DeserializeObject(response);

can not deserialize this string: (below)

{"appid":"1207000200020010006600000000000000010101","busicd":"170200","need_update":"1","psam_type":"","respcd":"0000","tck":"","usercd":"4","userid":"10101","usertype":"1"}