Installing FrameMaker Adapter for DITA Open Toolkit

I am trying to install the FrameMaker Adapter for the DITA Open Toolkit. I was able to add the DITA-OT application to the file in my FrameMaker 8 installation, but when I tried to generate sample FrameMaker output (step 1.3 in the framemake_adapter_adapter0.8\FrameMaker_adapter\ReadMe.html file) with this command:

ant -Dargs.input="samples\sequence.ditamap" dita2fmxml

I received this message:

C:\DITA-OT\build_preprocess.xml:32: java.lang.NoSuchMethodError: java.util.Prope

If anyone has any advice on what may be wrong, I would appreciate hearing from you.

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