Can anyone see why this doesn't work?

Posting to http://zxing.org/w/decode

I get a Bad Image response when I submit to the form. Using the same params via the web brings back good results.

Titanium.App.addEventListener("scan_camera", function (e){
    //Titanium.Media.takePicture();
    var obj = new Object();
    obj.imageurl = "http://www.justinhall.com/scanner/sites/default/files/scans/bw_1273007098.jpg";
    Titanium.App.fireEvent("zxingit", obj);
});


Titanium.App.addEventListener("zxingit", function (e){
var xhr = Titanium.Network.createHTTPClient();
    Titanium.API.info(e.imageurl);
    //
    xhr.onerror = function(e) {
      var a = Titanium.UI.createAlertDialog({ 
        title:'Well, this is awkward...',
        message: 'We had a problem scanning your barcode - please try again'
      });
        a.show();
    };
    xhr.onload = function() {
        output = 'status ' + this.status + 'n';
        output += 'connected ' + this.connected + 'n';
        output += 'readyState ' + this.readyState + 'n';
        output += 'responseText ' + this.responseText + 'n';
        output += 'responseXML ' + this.responseXML + 'n';
        output += 'responseData ' + this.responseData + 'n';
        output += 'connectionType ' + this.connectionType + 'n';
        output += 'location ' + this.location + 'n';

        var a = Titanium.UI.createAlertDialog({ 
        title:'From ZXING',
        message: output
      });
        a.show();
        var xml = Ti.XML.parseString(this.responseText);
        var table = xml.documentElement.getElementsByTagName("td");
        var ean = table.item(0).firstChild.nodeValue;
        actInd.hide();
        if(ean.length == 13){
            Titanium.App.fireEvent("findSKU", ean);
        } else {
            var a = Titanium.UI.createAlertDialog({ 
            title:'Barcode Not Found',
            message: "Please rescan the barcode."
            });
            a.show();
        }
    };

    var img = e.imageurl;

    xhr.onsendstream = function(e) {

    };
    //xhr.setRequestHeader('Content-Type', 'text/html;');
    xhr.open('GET','http://zxing.org/w/decode');

    xhr.send({
        'u':img,'full':"true",'type':'Submit'
    });
)};