Using a non-standard port using SQLNCLI10 OLEDB
Connection string
This SQL Server Native Client 10.0 OLE DB Provider connection string can be used for connections to SQL Server 2008, SQL Server 2005, SQL Server 2000 and SQL Server 7.0.
If your SQL Server listens on a non-default port you can specify that using the servername,xxxx syntax (note the comma, it's not a colon).
Provider=SQLNCLI10;Server=myServerName,myPortNumber;Database=myDataBase;
Uid=myUsername;Pwd=myPassword;
The default SQL Server port is 1433 and there is no need to specify that in the connection string.