Applet doesn't run with Tomcat - please help!

Hello!
I have a problem with running an applet in Eclipse IDE, using J2EE and a Dynamic Web Project and a Tomcat server.
The directory structure is:
ProjectName
- Java Resources->PackageName->AppletName.java
- built->classes->PackageName->AppletName.class
- WebContent->index.html
In my index.html page I put this code:
<applet code="PackageName.AppletName" width="500" height="200"></applet>
If I run this applet like a simple Java Applet, it runs.
But If I run this on server, my browser doesn't show me anything. I've try several posibilities, but it doesn't work. I should do some configurations on my Tomcat or I wrote something wrong on in my index.hml code, or my AppletName it isn't a simple java class?
Thank you for your time!
Adina

My index.html is in WebContent, so I've already put the AppletClass.class there.
I've tried with a jar and if I run this on server it doesn't work either. I don't know if there is any Tomcat->server.xml settings...
It's so frustrating...
Any ideas?
The error message is:
Java Plug-in 1.6.0_22
Using JRE version 1.6.0_22-b04 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\adina
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
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
load: class app not found.
java.lang.ClassNotFoundException: app
     at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed:http://localhost:8080/app.class
     at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     ... 9 more
Exception: java.lang.ClassNotFoundException: app
Edited by: 811815 on Nov 17, 2010 12:11 AM

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