JVM does load DLL within JAR executable

Hi,
I'm not sure the following problem is related to this forum but...
I have problem to load native code (DLL) by running executabe JAR file(created by JBuilder 9).
The program runs fine within JBuilder & Eclipse compilers.
When run the EXE an error says "JVM cannot load the DLL" in java library path.
I have tried without succes:
1. Loading dll in main function: [System.load() & System.loadlibrary()].
2. Running JVM with parameter: -Djava.library.path=<DLL path>
* running the class with "java" application works fine as well.
Any ideas?
Thanks,
AST

I extract the DLL file to working directory if necessary, also the DLL is stored in System32 & working directories (the directories are part of Java library path).
Normally,the DLL is loaded by external package that embedded to program, could it be that executable JAR blocks access to native code?
Thanks,
AST

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