Web Site Administration Tool ERRORS

Question

Hi, I try to use Web Site Administration Tool to set up Roles in my website.

I receive an error testing "AspNetSqlProvider"

"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 used aspnet_regsql command-line utility successfully and in Visual Studio I can see in Server Explorer the database and all the tables.

WebConf is empty

What the problem could be? thanks