FLASH PAYPAL PHP Redirect Problem

programming flash
1

Help ! help ! help !

I have a Flash web desighned in AS3 and added the PAYPAL Checkout button on my Flash Web page. I call the PAYPAL SetExpressCheckout command using

var [[COLOR=#0000ff]url:URLRequest[/COLOR] = new URLRequest [URL=“http://localhost/expresscheckout.php”]COLOR=#0000ff;
var loader:URLLoader = new URLLoader (url);

Everything works fine, I receive the TOKEN from PAYPAL but command execution stops at
header("Location: ".$payPalURL);

The internet browser does not redirect to PAYPAL.

Any help ?

Thanks
Hagop