Connecting to SQL Server - is that so difficult???

I have an ASP.Net web form.

I have Crystal Reports for .NET Framework 4.0.

I have a test database with one table that has one column.  I'm using the 'sa' login.

The page has the code below.  There is a basic CrystalReportViewer control on the page.

When I preview the report in Visual Studio it shows real data correctly.

When I view the page I see this:

Failed to open the connection. Details: [Database Vendor Code: 17 ] Failed to open the connection. CrystalReport1 {6CDF6401-23A1-45C0-AC81-7EEAC508ABA4}.rpt Details: [Database Vendor Code: 17 ]

Apparently "Database vendor code 17" means "server does not exist or access denied" yet if I use the same settings and connect directly via ADO.Net code it works first time, every time.

It's been two days now: I've never wasted so much time getting a product to connect to a MSSQL DB.

protectedvoid Page_Load(object sender, EventArgs e)

        {

             ReportDocument cryRpt = newReportDocument();

             TableLogOnInfo crtableLogoninfo = newTableLogOnInfo();

             ConnectionInfo crConnectionInfo = newConnectionInfo();

             Tables CrTables;

             cryRpt.Load(Server.MapPath("CrystalReport1.rpt"));

             crConnectionInfo.ServerName = "localhost";

             crConnectionInfo.IntegratedSecurity = false;

            crConnectionInfo.DatabaseName = "Test1";

            crConnectionInfo.UserID = "sa";

            crConnectionInfo.Password = "xxxxxxxx";

            CrTables = cryRpt.Database.Tables;

             foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in CrTables)

            {

                crtableLogoninfo = CrTable.LogOnInfo;

                crtableLogoninfo.ConnectionInfo = crConnectionInfo;

                CrTable.ApplyLogOnInfo(crtableLogoninfo);

            }

            CrystalReportViewer1.ReportSource = cryRpt;

            CrystalReportViewer1.RefreshReport();

        }

David