 <p>Add a dot <code>.</code> after the <code>localhost</code>.</p> <p>For example if you had <strong>http://localhost:24448/HomePage.aspx</strong></p> <p>Change it to <strong>http://localhost.:24448/HomePage.aspx</strong></p> <p>Internet Explorer is bypassing the proxy server for "localhost". With the dot, the "localhost" check in the domain name fails.</p>