login page in asp.net in authorization form

<authentication mode="Forms">
   <forms name="MYWEBAPP.ASPXAUTH" loginUrl="~/manager/LogIn.aspx" defaultUrl="~/manager/LogIn.aspx" protection="All" path="/" />
 </authentication>
 <authorization>
   <allow users="*" />
   <deny users="?" />
 </authorization>

<location path="manager">
  <system.web>
    <authorization>
      <allow roles="admin" />
      <deny users="*" />
    </authorization>
  </system.web>
</location>

<configuration>
   <appSettings/>
   <connectionStrings/>
   <system.web>
     <pages theme="admin" />
     <authorization>
       <allow roles="Admin" />
       <deny users="*" />
     </authorization>
   </system.web>
 </configuration>