When you install FileMaker Pro ODBC drivers on Windows 7 64-bit machine you may find that you are missing the Drivers when you open the Data Sources(ODBC) utility. There are many articles about a possible regedit change but in this case that didn’t apply.
The driver is a 32-bit driver and the ODBC utility is for the 64-bit. So to see all the 32 bit drivers go to C:\Windows\sysWOW64\odbcad32.exe and the run the 32-bit ODBC utility. Remember to create an alias to the file to make it easier to find next time.