Jonathan, I'm having a hell of a time trying to get a SOAP service running on an Orion app server.
I understand that this error can be caused by a classpath problem. I put all of my remote classes in a jar and put them in orion/lib which should pick them up for all applications on orion to use. I also put them in my classpath. None of this works. I had success bu NOT putting soap.jar in eithier orion home or orion/lib, but rahter putting it in web-app/web-inf/lib. I do not remember the error i was getting, but this may help cheers timj