I am trying to install YAF 1.9.6.1 of Codeplex on DNN 7 Pro, but am getting the following error. Using IIS 7 and SQLExpress 2008.

The 'System.Web.Security.SqlRoleProvider' requires a database schema compatible with schema version '1'. However, the current database schema is not compatible with this version. You may need to either install a compatible schema with aspnet_regsql.exe (available in the framework installation directory), or upgrade the provider to a newer version.

Any ideas on how to resolve?