PhoneGap Build: loading cordova.file-transfer always with code 3 on Android

This is annoying. A few days ago, I was unable to connect the Cordova file transfer plugin to work with PhoneGap 3.6.3. Now it seems that the problem with "undefinded" errors was resolved after I rewrote index.js. This is an old problem: PhoneGap Build: plugins not working (getting "undefined" errors) on Android

Now I am facing a new problem: The download on Android always failed with the following message:

FileTransferError

body: null

code: 3

exception: null

http_status: 401

source: " http://www.hs-bremerhaven.de/fileadmin/images/logo.png "

target: "file: ///data/data/de.testapp1374839/files/logo.png"

proto : object

I've already tried to add these featue tags to my config.xml file:

<feature name="http://api.phonegap.com/1.0/file"/>
<feature name="http://api.phonegap.com/1.0/network"/>

      

        
        
        
      

    

And I have provided a template for accessing external resources.

<access origin="*"/>

      

        
        
        
      

    

This is the updated index.js:

var DR = {
    initialize: function(){
        this.bindEvents();
    },
bindEvents: function() {
    document.addEventListener('deviceready', this.onDeviceReady, false);
    document.getElementById('download').addEventListener('click', this.downloadFile, false);
},
onDeviceReady: function(){
},

downloadFile: function(){
    console.log("Downloading...");
    var $status = document.querySelector("#fileStatus");;
    var assetURL = encodeURI("http://www.hs-bremerhaven.de/fileadmin/images/logo.png");
    var fileName = "logo.png";
    var DEV_PATH = cordova.file.dataDirectory;
    var fullPath = DEV_PATH + fileName;
    console.log("DEV_PATH " + DEV_PATH);
    $status.innerHTML = "Checking for file";

     window.resolveLocalFileSystemURL(fullPath, onFilePresent, downloadAsset);

    function onFilePresent(){
        console.log("File already there");
    }
    function downloadAsset() {
        var fileTransfer = new FileTransfer();
        console.log("Downloading: " + assetURL + " to " + fullPath);

        fileTransfer.download(assetURL, fullPath, 
            function(entry) {
                console.log("Success!");
                onFilePresent();
            }, 
            function(err) {
                console.log("Error");
                $status.innerHTML = "Fehler.";
                console.dir(err);
            });
      } 
   },
  checkFile: function(){
       //todo
  }
};

      

        
        
        
      

    

Any help would be appreciated.