I've just downloaded and installed visual studio express 2013 for windows desktop.

I'm working behind a proxy with username/password authentication and I don't find how to register the product (witch is now active for 14 days).

Each time : 407 - Proxy Authentication Required

I tried editing the WDExpress.exe.config to add in the section 

```
    <defaultProxy>
        <proxy
        usesystemdefault="true"
        proxyaddress="http://x.x.x.x:8080"
        bypassonlocal="true"
        />

```

but it's nor working.