For your FileMaker side of things, are you using FileMaker Server or FileMaker Pro? What version? What operating system and version? What version of the FileMaker ODBC driver are you using on PDO to access FileMaker server? You will need to use the a FileMaker ODBC driver on the PDO service to connect to a FileMaker database via ODBC. Out of curiosity, have you tried the reverse connection?