ASP.NET Roles cookie question

Question

I have custom RoleProvider. I see that GetRolesForUser() getting called for each session even if the user auto-logged in via cookie.

99.99% of the users will have just one role 'USER' (app is public) and their roles won't change.

So I want the roles to be cached in Roles cookie so that GetRolesForUser() not called for each session.

I have this in my web.config:

<roleManager enabled="true" defaultProvider="MyRoleProvider" cacheRolesInCookie="true" cookieName="MyRoles" cookieSlidingExpiration="true" cookieTimeout="60" createPersistentCookie="true" >
   <providers>
      <clear/>
      <add connectionStringName="MyConnection" applicationName="MyApp" name="MyRoleProvider" type="My.Data.Security.MyRoleProvider"/>
   </providers>
</roleManager>

I see the Roles cookie saved in the same cookie file which has login info. Not sure if that is right or not.

But I still see GetRolesForUser() getting called for each new session.

What I am missing?