RuntimeException with XPCom.initXPCOM(...) from JavaConnect

Help !

How should I initialize Javaconnect from within a Java code of a XPCom component ?

My initialization code is:
     
     System.out.println("Loading javaxpcom.dll..");
     System.loadLibrary("javaxpcom");
     
     String mozillaPath = "c:/arquiv~1/mozill~1";
     java.io.File localFile = new java.io.File( mozillaPath );
     //XPCOM.initXPCOM(localFile, null);
     GeckoEmbed.initEmbedding(localFile, null);

I tried to follow the same way the JavaConnect test files do it, but I am receiving an RuntimeException, either using XPCOM and GeckoEmbed init methods.
I tried setting and reading a system variable for mozilla path (System.getProperty("MOZILLA_HOME");), but it was not recognized.

I am using LiveConnect, from Java Firefox Extension skeleton. I hope this won´t matter.

Curiously, after running the same java routine for a second time, the initialization method works, but then I get another RuntimeException at the next java commands:

  nsIComponentManager compMgr = XPCOM.getComponentManager();
  nsIChromeRegistry chromeRegistry = (nsIChromeRegistry)
   compMgr.createInstance( "mozilla.org/chrome/chrome-registry;1", null, nsIChromeRegistry.NS_ICHROMEREGISTRY_IID );

RuntimeException: The function "createInstance" returned an error condition  (0x80040154 = NS_ERROR_FACTORY_NOT_REGISTERED)

Any suggestions ?
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Murilo Perrone
CertiSign