I'm trying to itegrate an SSO solution into Kentico and need to figure out how to force a user logon with Kentico. I've been experimenting with the CMSLoaderAttribute and have the following code:

[PlatformSecurityEventsAttribute]
public partial class CMSModuleLoader
{
private class PlatformSecurityEventsAttribute : CMSLoaderAttribute
{
public override void Init()
{
CMSRequestEvents.Authenticate.Before += Authenticate_Before;
}


void Authenticate_Before(object sender, EventArgs e)
{
string username = "administrator";
CMSContext.AuthenticateUser(username, true);
}
}
}

I can see the breakpoints being hit and using Fiddler, I can even see the FormsAuthentication cookie being set in the browser. However, I'm still redirected to the logon page within Kentico. How can I overcome this?