Please note the following: "The new MySQL dbExpress driver, dbxmys30.dll, was tested against LibMySQL.dll from a 5.0.xx server install. If you intend to use dbExpress against MySQL 4.0.xx, you should either upgrade your LibMySQL.dll to a 5.0.xx version or use the dbxmysA30.dll driver with dbExpress. Using an older version of LibMySQL.dll with the current dbExpress driver for MySQL can result in unexpected behavior." - Taken from http://dn.codegear.com/article/36648. Hope this will help some people avoid the headaches I went through trying to get this stuff to work.