URGENT!! I can not see swing classes -:((((

Question

I am using Plug-In 1.3 and JRE but I do not see the swing classes.
In addition there is an error InstantiationException when I use other applet with AWT.
Microsoft (R) VM for Java, 5.0 Release 5.0.0.3234
==============================================
? help
c clear
f run finalizers
g garbage collect
m memory usage
q quit
t thread list
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java.lang.ClassNotFoundException: javax.swing.JApplet
     at com/ms/vm/loader/URLClassLoader.loadClass
     at java/lang/ClassLoader.loadClassInternal
     at java/lang/ClassLoader.resolveClass
     at com/ms/vm/loader/URLClassLoader.loadClass
     at com/ms/vm/loader/URLClassLoader.loadClass
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.run
     at java/lang/Thread.run

Answer 1

Thank you very much for your answers, but although it seems that it has found swing classes without putting anything in the classpath, it continue giving me problems. I think both error are because I am using database classes, shoud I put this classes in the classpath???? How??????
Java(TM) Plug-in: Version 1.3.1
Using JRE version 1.3.1 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\IRENE
Proxy Configuration: Browser Proxy Configuration
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
q: hide console
s: dump system properties
t: dump thread list
x: clear classloader cache
0-5: set trace level to <n>
java.lang.NoClassDefFoundError: symantec/itools/db/beans/binding/QueryNavigator
     at java.lang.Class.newInstance0(Native Method)
     at java.lang.Class.newInstance(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
java.lang.NoClassDefFoundError: symantec/itools/db/beans/binding/ParentInvalidRecordException
     at Prueba.<init>(Prueba.java:59)
     at java.lang.Class.newInstance0(Native Method)
     at java.lang.Class.newInstance(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)