[Fail] Could not add ASPNET user to SQL Server.

Ok here's my setup

1. Installed msde 2000 with sp3.
2. started the SQL Server and SQL Server Agent.
3. Ran IBuySpy Store Installation, when I ran the configuration I get error on bottum.

10:51:55 PM Tuesday, September 23, 2003: [Checking system requirements]
10:51:55 PM Tuesday, September 23, 2003: [Pass] Detected a local instance of SQL Server.
10:51:55 PM Tuesday, September 23, 2003: [Pass] Determined SQL Server version (8.00.194).
10:51:55 PM Tuesday, September 23, 2003: [Pass] Detected .NET Framework.
10:51:55 PM Tuesday, September 23, 2003: [Pass] Detected Internet Information Server (IIS).
10:52:03 PM Tuesday, September 23, 2003: [Begin Sample Configuration]
10:52:05 PM Tuesday, September 23, 2003: [Pass] Created IIS virtual directory.: StoreVBVS
10:52:05 PM Tuesday, September 23, 2003: [Pass] Determined SQL Server version (8.00.194).
10:52:22 PM Tuesday, September 23, 2003: [Fail] Could not add ASPNET user to SQL Server.
SQL Server does not exist or access denied.
10:52:22 PM Tuesday, September 23, 2003: [Done]

Can someone please tell me step by step on what I need to do and where to do it to get this working, thanks !!!did you add it via users in your db? when you xpand our db in sql server xplorer, you can add users using "users"...

HTH