Secure site

I already have this configuation but it says I do not:

<configuration>
   <system.web>
       <compilation debug="true"/>
   </system.web>
</configuration>

I am trying to make my site secure by adding an id and security check in each of my secure sites.

I use SQL and Session to accomplish this task with a Response.Redirect(mysite) if the criteria is not met (id and security of SQL and id and security of Session must be equal).

Is there any way of making this work?