2005/2005Express SQLOLEDB Provider problem

When creating a connection string in ADO (using Delphi7), I insert the provider like this:

Provider=SQLOLEDB;Data Source=.;Initial Catalog=master;Integrated Security=SSPI;User ID=sa;Password=masterkey

Now, when I try to run this on a SQL Server 2005 or SQL2005 Express database, it won't create the connection
unless I use the SQLNCLI provider.

Is there a way to force them to use the OLEDB provider?
I have MDAC2.8-SP1 installed.Try explicitly adding the server name

Provider=SQLOLEDB;Data Source=<Server Name>;Initial Catalog=master;Integrated Security=SSPI;User ID=sa;Password=masterkey