Couldn't Load DLL and Call JNI in Portal Servlet !!!

Hello,
I'm trying to write a small test servlet in portal which will call functions in a DLL using JNI. Here is my source code. I put my DLL in \Window\system32, usr/sap/J2E/JC01/j2ee/os_libs, even included into my portal project \PORTAL-INF\lib. But everytime when I try to preview my page, I got the following error and I couldn't find the log file specified in the error message. Please help me out. Thanks a lot!
Portal Runtime Error
An exception occurred while processing a request for :
iView : N/A
Component Name : N/A
MyTestDLL.
Exception id: 12:25_23/12/06_0029_11241950
See the details for the exception ID in the log file
Source Code:
import com.sapportals.portal.prt.component.*;
public class CIViewTest extends AbstractPortalComponent
     public void doContent(IPortalComponentRequest request, IPortalComponentResponse response)
          response.write("Hello From Java Servlet!!!\n");
     static {
          try {
               Runtime.getRuntime().loadLibrary("MyTestDLL");
// I've also tried System.LoadLibrary("MyTestDLL");
          } catch (UnsatisfiedLinkError ule) {
               throw ule;

Nobody used JNI in Portal Servlet??? Please advice. Thanks!

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M * TIME Thu May 22 19:58:52 2008
M * RELEASE 700
M * COMPONENT Taskhandler
M * VERSION 1
M * RC 13
M * MODULE thxxhead.c
M * LINE 10439
M * COUNTER 1
M *
M *****************************************************************************
M
M PfStatDisconnect: disconnect statistics
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Many thanks.
Regards.
Fabio

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