The 32-bit data sources used with the ODBC Desktop Database Drivers version 2.0 are automatically converted to 32-bit data sources for version 4.0 drivers. No conversion is provided for 16-bit data sources. To change a 16-bit data source to 32-bit, create a new 32-bit data source and then (optionally) delete the old 16-bit data source. A 32-bit data source and a 16-bit data source cannot share the same name.