Opening SQL Server 2008 Remotely

I have a Windows Server 2008 R2 network.  On the server resides a vb.net executable application program and a SQL Server 2008 database.  When I am logged directly onto the server I can launch the executable and open the database.  Unfortuantely, Windows Server 2008 does not support Windows 7 style graphics (i.e., forms with rounded corners and banners with opacity).  However, when I navigate from my desktop to the folder on the server with the executable and launch the executable I do get the Windows 7 style graphics, but I get the following error when I try to open the database with these statements.

        SqlConnection0.ConnectionString = "Data Source=" + strDataServer + ";Integrated Security=True;Initial Catalog=" + strDataBase
            SqlConnection0.Open()

strDataServer = "BDP-Server/SQLEXPRESS
strDataBase    = "BDP_Systems"

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 28 - Server doesn't support requested protocol)

SQL is configured with the "Allow Remote Connections" box checked.

Any thoughts?

Thanks.