Asp.net Authorization, problem in loading Default.aspx

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ASP.NET

security

hi,
i have a problem about athentication and authorization . this is my web.config :

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

  <location path="Contactus.aspx">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="About.aspx">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="Register.aspx">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="Default.aspx">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>


    <system.web>
    <customErrors mode="Off" defaultRedirect="ErrorPage.aspx">
    </customErrors>
    <globalization enableClientBasedCulture="true" culture="auto" uiCulture="auto" />

    <authentication mode="Forms">
      <forms loginUrl="~/Login.aspx" timeout="120" defaultUrl="~/Default.aspx" path="/" slidingExpiration="false" name="IVClientInformation" enableCrossAppRedirects="false" requireSSL="false" protection="All" cookieless="AutoDetect" />
    </authentication>
    <authorization>
      <deny users="?" />
    </authorization>
</configuration>

I can view my pages according the security model and authentication works fine, but problem is that when I use my url to view website Login.aspx loads instead of Default.aspx . I add a question about this problem few days ago and no acceptable answer found, some people asked about anonymous right on IIS , but host helpdesk told me that my app has the anonymous right. Please help , sorry 4 bad English.