Important notes about SharePoint 2010 custom role provider

When building a custom role provider for SharePoint 2010, make sure of the following:

• The Role Provider section must be added to the following web.configs
• Central Admin
• The Security Token Service
• The Web application
• The <RoleProvider tag in the web.config must have:
• enabled=true
• a default provider like (<roleManager enabled="true" defaultProvider="AspNetWindowsTokenRoleProvider" )