cannot use Form authentication for ASP.NET Dynamic Data

Hi. I found this article about helping Secure dynamic data site. However, I want to ask a question. I want to use directly form authentication by editing the web.config like this:
<authentication mode="Forms">
      <forms loginUrl="Authenticate.aspx" protection="All">
        
      </forms>
    </authentication>
    <authorization>
      <deny users="*"/>
      <allow users="abc"/>
    </authorization>
Then I add a Login control in Authenticate.aspx, after click Login button there is an error like this:

An error occurred during the execution of the SQL file 'InstallCommon.sql'. The SQL error number is 1802 and th ...