UnsatisfieldLinkError exception

Hi every body,
I  have some problems when I try to run JRex and I need your help. I have done 
the following operations on my Windows XP system:
1. I have unzipped the "jrex-bin-nolog-1.0b1_dom3.zip" file in "C:/jrex" 
directory.
2. I have unzipped the "jrex_gre.zip" file in "C:/jrex" directory.
3. I have moved the file "jrex.dll" from "C:/jrex" to "C:/jrex/jrex_gre".
4. I have set the JAVA_HOME variable to point to the "jre1.6.0" directory.
5. When I try to run the JRexTest example using the java command line: 
"java -Djrex.gre.path=C:/jrex/jrex_gre test.JRexTest" 
I have the  frllowing exception:
"*****************JRexL inited***************
*****************JRex-Logging disabled************
Unable to start up JRex Engine
...
JRexException at org.mozilla.jrex.JRexFactory.startEngine(JRexFactory.java:222)
                       at test.JRexTest.main(JRexTest.java:11)
caused by: java.lang.UnsatisfieldLinkError"
  
Thank you very much for your help.
  thx, Radhouane