I encountered this as well after using a script to clear my database. If you are using godaddy, you can reinstall the ASP.NET Schema using the hosting manager. You can also restore the db if you have a working backup.
the aspnet_ShemaVersions table should have these values
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Re: The 'System.Web.Security.SqlRoleProvider' requires a database schema compatible with schema v...
Sep 15, 2010 08:20 AM|digitz82|LINK
I encountered this as well after using a script to clear my database. If you are using godaddy, you can reinstall the ASP.NET Schema using the hosting manager. You can also restore the db if you have a working backup.
the aspnet_ShemaVersions table should have these values