When I follow the EPiServer CMS installation instructions I can not get the through the provider step. When I choose SqlServerMembershipProvider and click "test" I get the following error: "Could not establish a connection to the database. If you have not yet created the SQL Server database, exit the Web Site Administration tool, use the aspnet_regsql command-line utility to create and configure the database, and then return to this tool to set the provider. " I have then run the aspnet_regsql to set up the database. I use a SQL 2005 Express database. After that I still get the same error in the ASP.NET Administration Tool.