roleManager not recognized, after framework beta 2 removed.

[1.1 SDK installed after the removal]

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.web>
<authentication mode="Forms" />
<roleManager enabled="false" />
<!-- <roleManager enabled="true" /> -->
<!-- BSam 06/06/2005 5:36PM -->
<!-- Project
http://localhost/MCSD70.315/chapter0.../WebForm1.aspx reported error:
-->
<!--
Configuration Error
Description: An error occurred during the processing of a configuration
file required to service this request. Please review the specific error
details below and modify your configuration file appropriately.
Parser Error Message: Unrecognized configuration section 'roleManager'
Source File: L:\MCSD70.315\web.config Line: 5
Rem it out
IE took long time and didn't load the page.
Changed it to <roleManager enabled="false" />
Parser Error Message: Unrecognized configuration section
'roleManager'
What is going on?
-->
<compilation debug="true" defaultLanguage="c#" />
<trace enabled="true" pageOutput="true" />
</system.web>
</configuration>