Step :

1. Execute Tools-Update Center...
2. Check the second radio button (Install module (.nbm files) manually 
downloaded.... option)
3. add the wheel.nbm file located in the local directory and finish setting
4. Exit NetBeans IDE 3.2 and restart it.

=> "Unexpected Exception" dialog appears....
Detail contents :
Wed Apr 11 17:26:05 KST 2001: java.lang.UnsatisfiedLinkError: initIDs
java.lang.UnsatisfiedLinkError: initIDs
        at org.netbeans.modules.mousewheel.MouseWheelHandler.initIDs(Native 
Method)
        at org.netbeans.modules.mousewheel.MouseWheelHandler.<clinit>
(MouseWheelHandler.java:49)
        at org.netbeans.modules.mousewheel.MouseWheelModule$1.run
(MouseWheelModule.java:73)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:337)
        at java.awt.EventDispatchThread.pumpOneEvent
(EventDispatchThread.java:103)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)

=============================================================
ide.log file contents :

-------------------------------------------------------------------------------
>Log Session: 2001³â 4¿ù 11ÀÏ ¼ö¿äÀÏ ¿ÀÈÄ 05½Ã00ºÐ30ÃÊ KST
>System Info: 
  Product Version       = NetBeans IDE 3.2, Release Candidate 1 (Build 27)
  IDE Versioning        = IDE/1 spec=1.2.1 impl=27
  Operating System      = Windows 2000 version 5.0 running on x86
  Java; VM; Vendor      = 1.3.1-beta; Java HotSpot(TM) Client VM 1.3.1beta-b15; 
Sun Microsystems Inc.
  Java Home             = d:\devtool\jdk1.3.1\jre
  System Locale         = ko_KR
  Home Dir; Current Dir = C:\Documents and Settings\chrisim; 
D:\DevTool\NetBeans\bin
  IDE Install; User Dir = D:\DevTool\NetBeans; D:\DevTool\NetBeans\bin\usr
  CLASSPATH             = D:\DevTool\NetBeans\lib\patches\openide-
compat.jar;D:\DevTool\NetBeans\lib\openide-
fs.jar;D:\DevTool\NetBeans\lib\openide.jar;D:\DevTool\NetBeans\lib\openide-
util.jar;D:\DevTool\NetBeans\lib\openide-
nodes.jar;D:\DevTool\NetBeans\lib\core.jar;D:\DevTool\NetBeans\lib\ext\jaxp.jar;
D:\DevTool\NetBeans\lib\ext\xerces.jar;D:\DevTool\NetBeans\lib\ext\regexp.jar;D:
\DevTool\NetBeans\lib\ext\sax2.jar;D:\DevTool\NetBeans\lib\ext\parser.jar;D:\Dev
Tool\NetBeans\lib\ext\servlet.jar;D:\DevTool\NetBeans\lib\ext\jh.jar;D:\DevTool\
NetBeans\lib\ext\rmi-
ext.jar;D:\DevTool\NetBeans\lib\ext\jpython.jar;d:\devtool\jdk1.3.1
\lib\dt.jar;d:\devtool\jdk1.3.1\lib\tools.jar
-------------------------------------------------------------------------------
[INFO] Loaded modules: org.netbeans.core/1 (1.0/unspec); 
org.netbeans.modules.autoupdate/1 (1.6.1/27); org.netbeans.modules.clazz/1 
(1.6.1/27); org.netbeans.modules.debugger.core/2 (2.0.1/27); 
org.netbeans.modules.debugger.debug/1 (1.8.1/27); 
org.netbeans.modules.debugger.jpda/1 (1.8.1/27); org.netbeans.modules.editor/1 
(1.7.1/27); org.netbeans.modules.jarpackager/2 (1.6.1/27); 
org.netbeans.modules.java/1 (1.6.1/27); org.netbeans.modules.javadoc/1 
(1.6.1/27); org.netbeans.modules.objectbrowser/1 (1.6.1/27); 
org.netbeans.modules.projects/1 (1.6.1/27); org.netbeans.modules.properties/1 
(1.6.1/27); org.netbeans.modules.i18n/1 (1.7/27); 
org.netbeans.modules.properties.syntax/1 (1.6.1/27); 
org.netbeans.modules.text/1 (1.6.1/27); org.netbeans.modules.usersguide/1 
(1.7.1/27); org.openidex.util/1 (1.7.1/27); org.netbeans.modules.utilities/1 
(1.6.1/27); org.netbeans.modules.apisupport.lite/1 (0.1.1/27); 
org.netbeans.modules.mousewheel/1 (0.0.1/unspec)
java.lang.UnsatisfiedLinkError: no wheel in java.library.path
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1312)
	at java.lang.Runtime.loadLibrary0(Runtime.java:749)
	at java.lang.System.loadLibrary(System.java:820)
	at org.netbeans.modules.mousewheel.MouseWheelModule.<clinit>
(MouseWheelModule.java:46)
	at java.io.ObjectStreamClass.hasStaticInitializer(Native Method)
	at java.io.ObjectStreamClass.computeSerialVersionUID
(ObjectStreamClass.java:923)
	at java.io.ObjectStreamClass.access$200(ObjectStreamClass.java:46)
	at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:420)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.io.ObjectStreamClass.init(ObjectStreamClass.java:401)
	at java.io.ObjectStreamClass.lookupInternal
(ObjectStreamClass.java:112)
	at java.io.ObjectStreamClass.setClass(ObjectStreamClass.java:566)
	at java.io.ObjectInputStream.inputClassDescriptor
(ObjectInputStream.java:936)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:366)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
	at java.io.ObjectInputStream.inputClassFields
(ObjectInputStream.java:2263)
	at java.io.ObjectInputStream.defaultReadObject
(ObjectInputStream.java:519)
	at org.openide.util.SharedClassObject$WriteReplace.readObject
(SharedClassObject.java:472)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.io.ObjectInputStream.invokeObjectReader
(ObjectInputStream.java:2214)
	at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1411)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
	at org.openide.util.io.NbObjectInputStream.readSafely
(NbObjectInputStream.java:78)
	at org.netbeans.core.ModuleInstaller.deExternalizeModules
(ModuleInstaller.java:992)
	at org.netbeans.core.ModuleInstaller.initialize
(ModuleInstaller.java:244)
	at org.netbeans.core.NonGui.run(NonGui.java:479)
	at org.netbeans.core.Main.run(Main.java:168)
	at org.openide.TopManager.initializeTopManager(TopManager.java:120)
	at org.openide.TopManager.getDefault(TopManager.java:81)
	at org.netbeans.core.Main.main(Main.java:255)
	at org.netbeans.core.TopThreadGroup.run(TopThreadGroup.java:90)
	at java.lang.Thread.run(Thread.java:484)
JavadocModule: numberOfStarts=7
*********** Exception occurred ************
Wed Apr 11 17:00:43 KST 2001: java.lang.UnsatisfiedLinkError: initIDs
java.lang.UnsatisfiedLinkError: initIDs
	at org.netbeans.modules.mousewheel.MouseWheelHandler.initIDs(Native 
Method)
	at org.netbeans.modules.mousewheel.MouseWheelHandler.<clinit>
(MouseWheelHandler.java:49)
	at org.netbeans.modules.mousewheel.MouseWheelModule$1.run
(MouseWheelModule.java:73)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:337)
[catch] at java.awt.EventDispatchThread.pumpOneEvent
(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents
(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
WARNING: d:\devtool\jdk1.3.1\jre\classes cannot be opened
org.openide.filesystems.FSException: Root d:\devtool\jdk1.3.1\jre\classes does 
not exist.


============================

I hope to have feedback as soon as possible~ ^^*
Have a nice day~~~