[flexcoders] How to attach a local file to an email with URLRequest from AIR

[breizo]

I am trying to send an email through the default local email system with 
URLRequest. 
Tried the example below with no success. 
Also tried to add " around s with no more success...
Has anybody done it before?

Thanks

var file:File = File.documentsDirectory("myfile.txt");
var s:String = file.url;

var request:URLRequest=new 
URLRequest("mailto:a...@b.com?subject=hello&body=trying to 
attach&attachment="+s);
navigateToURL(request,"_self");