Do you have FileMaker Server Advanced? You can set up FMS as an ODBC source, but only the advanced version.
Then turn on Sharing for the databases as ODBC source. The driver for xDBC with FM as source is on the install and may not install automatically.
See if this helps:
and download the guide "FileMaker 12 ODBC and JDBC Guide" http://www.filemaker.com/support/product/docs/12/fmp/fm12_odbc_jdbc_guide_en.pdf
Once again, thank you Beverly!
I will go through the guide and come back with any questions.