Asp.Net page starts without URI

Question

I am not able to make my ASP.Net login page receive any postback the first time. My solution structure is as follows Root - Login/Login.aspx - UI/Homepage.aspx

When I start my asp.net website from visual studio, it shows the login.aspx page but the URL at the top of the browser says http://app.mysass.com and not http://app.mysass.com/Login/Login.aspx

The funny thing is if I click on the login button on this page, the page reload itself back to http://app.mysass.com. The server side button click is not even hit.

Only when I type in http://app.mysass.com/Login/Login.aspx and then click the login button then btn_click on postback gets fired on the server.

I am guessing this has go something to do with my web.config so here it is.

<configuration>

  <system.web>
    <authentication mode="Forms">
      <forms loginUrl="~/Login/Login.aspx" name=".DEBUG" defaultUrl="~/UI/Homepage.aspx" protection="All" timeout="240" path="/" slidingExpiration="true" cookieless="UseCookies" />
    </authentication>

    <authorization>
      <deny users="?" />
      <allow users="*" />
    </authorization> 
  </system.web>

  <system.webServer>
    <defaultDocument>
      <files>
        <clear />
        <add value="~/UI/Homepage.aspx" />
      </files>
    </defaultDocument>
  </system.webServer>

  <location path="Login" allowOverride="false">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>

</configuration>