发送消息失败

参照这个api进行消息发送, 总是返回错误, 使用示例代码也是一样的错误, 下面是使用示例代码的错误
错误：

HTTP/1.1 401 UnauthorizedServer: Tengine/2.0.3Date: Tue, 07 Apr 2015 14:36:16 GMTContent-Type: application/jsonTransfer-Encoding: chunkedConnection: keep-aliveSet-Cookie: rememberMe=deleteMe; Path=/; Max-Age=0; Expires=Mon, 06-Apr-2015 14:36:16 GMTAccess-Control-Allow-Origin: *
{"error":"unauthorized","timestamp":1428417376965,"duration":0,"exception":"org.apache.shiro.authz.UnauthorizedException","error_description":"Subject does not have permission "}