HTTP 404 would probably mean that resource is not found or Web resource that you are trying to access is not available.
you need to check the Application Server logs to see if the MobileBIService did start successfully. See if the logs indicate that the MobileBIService did start successfully.
Internally you could just do a check like http://server:port/MobileBIService/MessageHandlerServlet?message=GetVersion on a browser to see if server is responding.
Regards
Vikas