Unable to load external XML-file on iOS-device (ioError) (urgent!)

I try to load an external xml-file from a server, but until now, I didn't manage.

Locally it loads, but when on a server, it doesn't.

In the root of the domain I placed a crossdomain.xml containing:

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
<site-control permitted-cross-domain-policies="all" />
<allow-access-from domain="*" />
<allow-http-request-headers-from domain="*" headers="*"/>
</cross-domain-policy>

And in Flash I use this (most simplified) code:

import flash.display.Sprite;
import flash.errors.*;
import flash.events.*;
import flash.net.URLLoader;
import flash.net.URLRequest;

var request: URLRequest = new URLRequest("http://www.zinder.nl/nivoContentLive.xml");
var loader: URLLoader = new URLLoader();
loader.addEventListener(Event.COMPLETE, completeHandler);
try {
    loader.load(request);
} catch (error: ArgumentError) {
    trace("An ArgumentError has occurred.");
} catch (error: SecurityError) {
    trace("A SecurityError has occurred.");
}
function completeHandler(event: Event): void {
    var dataXML: XML = XML(event.target.data);
    trace(dataXML.toXMLString());
}

This is the error I receive:

Error #2044: Unhandled ioError:. text=Error #2032: Stream Error. URL: http://www.zinder.nl/nivoContentLive.xml

It's a pretty urgent issue, so hope someone can help