You appear to have WIN32::ODBC installed but not DBD::ODBC. They are not the same. BTW, I doubt you need to use DBD::ODBC. Also, whether you can define Driver as "SQL Server" will depend on whether you have actually installed an ODBC driver called "SQL Server" - if you haven't installing DBD::ODBC is not going to make a difference i.e., you need to install an ODBC driver for SQL Server in addition to DBD::ODBC.