Running a java applet in web application with tomcat 6 and the redirection from IIS 8.5

Question

I try to run an application web java with applet in page jsp and tomcat by using a redirection isapi_redirect to IIS web server, but i have an error like this :

load: class com.ubs.swidULF.v3.client.appletintegration.UlfDefaultAppletLauncher.class not found.
java.lang.ClassNotFoundException: com.ubs.swidULF.v3.client.appletintegration.UlfDefaultAppletLauncher.class
    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)
Exception: java.lang.ClassNotFoundException: com.ubs.swidULF.v3.client.appletintegration.UlfDefaultAppletLauncher.class

This is the html of the applet in jsp file present in tomcat :

<param name= "java_archive" value="ulc-base-client-3.jar,ulc-servlet-client-6.3.2.jar, UAI_AppletIntegrationClient-4.jar, ULF_3_LookAndFeelClientLib-Signed-3.1.0-RC1-SNAPSHOT.jar" />  
<param name= "java_codebase" value="<%= request.getContextPath() + "/lib/" %>" / >

For information the jar are presents in the folder tomcat6.0/webapps/myapplication/lib and when i test the link : http://myserver:88/ULF_3_LookAndFeelClientLib-Signed-3.1.0-RC1-SNAPSHOT.jar i can download the jar, i can download all the jar,

an the class com.ubs.swidULF.v3.client.appletintegration.UlfDefaultAppletLauncher.class , it present in the jar UAI_AppletIntegrationClient-4.jar,ULF_3_LookAndFeelClientLib-Signed-3.1.0-RC1-SNAPSHOT.jar

for the redirection from IIS to tomcat , i use the dll isapi_redirect. the application works with apache2.2 and tomcat 6