FirePass - java.lang.NoClassDefFoundError: F5JApplet

We need to maintain a system that uses FirePass and need to add an applet to one of the applications that is accessed via FirePass. When the applet is accessed directly everything is ok, but when accessed via FirePass we see the error:

java.lang.NoClassDefFoundError: F5JApplet at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source)

We realise that FirePass re-writes the Java byte code and have tried switching that off, but we then get issues with the applet not being able to resolve some of the URLs.

Are there any additional libraries that need to be installed on the client? Or how are the F5Applet, F5Socket classes supposed to be added?

Appreciate any help Ka