同事用七牛的java sdk给我生成了一个token，然后我用android sdk通过

    mUploadManager.put(datas, key, uploadToken,
            new UpCompletionHandler() {
                @Override
                public void complete(String key, ResponseInfo info,                                 JSONObject res) {
                    Log.i("qiniu", key + ",\r\n " + info + ",\r\n " + res);
                }
            }, null);进行简单上传，打印的错误消息如下：
                {ResponseInfo:1440139806712533,status:-1004, reqId:null, xlog:null, xvia:null, host:up.qiniu.com, path:/, ip:null, port:80, duration:0.020000 s, time:1440139807, sent:0,error:socket failed: EACCES (Permission denied)},
null
请问这是什么原因造成的？