The Connect property is used to connect to SQL servers or ODBC sources by default so you don't have to specify the driver. Based on your example then you would want the following:

crptName.Connect = "DSN=" & ServerName & ";UID=sa;PWD=pass;DSQ=" & DatabaseName

Note: Use the Connect property when the report connects to only a single ODBC data source or SQL server, and only a single set of log on information is required. If the report connects to multiple data sources that require different log on information, use LogOnInfo Property.