I&#39;m getting this error when I call a web service:

&quot;The remote server returned an error: (407) Proxy Authentication Required&quot;.

I get the general idea and I can get the code to work by adding

    myProxy.Credentials = NetworkCredential(&quot;user&quot;, &quot;password&quot;, &quot;domain&quot;);

or by using DefaultCredentials in code.  My problem is that the call to the web service works in production without this.

It seems like there is a non code solution involving Machine.config, but what is it?  At the moment I can&#39;t get to the production box&#39;s machine.config file to see what that looks like.  I tried updating my machine.config as follows, but I still get the 407 error.  

&lt;!-- language: lang-xml --&gt;

    &lt;system.net&gt;
        &lt;defaultProxy enabled=&quot;true&quot; useDefaultCredentials=&quot;true&quot;&gt;
            &lt;bypasslist&gt;
                &lt;clear /&gt;
            &lt;/bypasslist&gt;
            &lt;proxy proxyaddress=&quot;myproxy:9000&quot;
                   usesystemdefault=&quot;false&quot;
                   bypassonlocal=&quot;true&quot;
                   autoDetect=&quot;False&quot; /&gt;
        &lt;/defaultProxy&gt;
    &lt;/system.net&gt;


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The remote server returned an error: (407) Proxy Authentication Required