Java - RMI muy urgente

Hola a todos, tengo un problema con RMI, tengo un applet que usa RMI pero me da una excepcion y creo que hace falta configurar algo. Por favor si hay alguien tiene informacion que me la mande o alguna idea de porque me da la excepcion. Muchas gracias.

La expcion es esta y me da en IE

com.ms.security.SecurityExceptionEx[com/isb/rigel/test/local/Applet.registrar]: java.io.IOException: bad path: D:\WSAD_WORKSPACE\local\Local\bin\java\rmi\Naming.class
at com/ms/security/permissions/FileIOPermission.check
at com/ms/security/PolicyEngine.deepCheck
at com/ms/security/PolicyEngine.checkPermission
at com/ms/security/StandardSecurityManager.chk
at com/ms/security/StandardSecurityManager.checkRead
at java/io/File.isDirectory
at sun/net/www/protocol/file/FileURLConnection.connect
at sun/net/www/protocol/file/FileURLConnection.getInputStream
at com/ms/vm/loader/ResourceLoader.getURLData
at com/ms/vm/loader/ResourceLoader.getCodebaseRelativeData
at com/ms/vm/loader/ResourceLoader.getClassData
at com/ms/vm/loader/URLClassLoader.findClass
at com/ms/vm/loader/URLClassLoader.loadClass
at java/lang/ClassLoader.loadClassInternal
at com/isb/rigel/test/local/pplet.registrar
java.lang.ClassNotFoundException: java.rmi.Naming

http://java.sun.com/j2se/1.5.0/docs/guide/rmi/faq.html
Java RMI
Very Frequent Questions
...
A.4 Why am I getting a ClassNotFoundException?
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http://java.sun.com/j2se/1.5.0/docs/guide/rmi/codebase.html