I am trying to use the 64 bit rxtx serial communication library (downloaded from cloudhopper) with 64bit windows 7 and eclipse. I get the message: java.lang.Unsatisfi
java.lang.Unsatisfi
You can also add a virtual machine argument:
-Djava.library.path=c:\path\to\dll\
or
-Djava.library.path=/path/to/lib/
That worked for me. Also refer to this question.