Please help me set up SQL Express

I am extremely new to ASP, SQL, everything. I'm trying to set up a simple username/password system for our website (built with Expression Web) that would only be used by about 15 employees. I am following directions in Zak Ruvalcaba's book on Expression Web, and I'm stuck. I have .NET Framework and SQL Express downloaded and installed. I'm running the ASP.NET SQL Server Setup Wizard, but Setup fails because it is unable to connect to SQL Server database. I'm completely lost. Any help would be greatly appreciated. Thanks.

How to configure services for Asp.net is covered in the link below, post again if you still need help.

http://weblogs.asp.net/scottgu/archive/2005/08/25/423703.aspx