If i understand correctly, you want the feature like PHP talks to Java back and fort, if so then there is Bridge called javaBridge which is a open source and provides few examples how to integrate.
Did you modify the deployment descriptor file after your made copy of it. check whether you can access your servlet first. if no correct it then correct your deployment descriptor then you will get your html file.
Your server has User Define objects ( Your own class ). try to do one thing write a small server side method like addNumber(int a, int b). Which returns a + b; . Know try to test it with your bpel code.
If your intnetion is to transfer the file. You need to use file Handler, so that you can send the file using ( soap ) the web services. Google for example of Web services File handler
I guess you are using the wrong jar files. please check the installation instructions of the Axis web services version. and make sure that they are in class path
Are you getting the web services input parameters dynamically, are you creating the input paramters and passing them. if you are getting then dynamically try to convert them to their respective types and pass.
