Hi Robert,
In order to import each object on the sheet as a symbol, the published DWF file must include block information. If you are using AutoCAD or an AutoCAD-based application to publish the DWF, the option to include block information is found within the "Publish Options" portion of the main Publish dialog.
If you need more detailed guidance in doing this, please let me know what application you are using to publish the DWF and I can walk you through the process.
Best Regards,
Scott Lillibridge, QA Manager
Platform Solutions & Emerging Business
Autodesk, Inc.