I think you are asking this question not only on the wrong section but also on the wrong website.
The error you are refering to is a Axis2 specific exception, you might get the best answer by posting your question to the Axis2 mailing list:
BTW your exception "java.lang.UnsupportedOperationException: TODO"
=> looks like you have some comment left over in your Web-Service invokation. Actually your WSDL has no Method "TODO" so where should this call route to? I guess you should debug your code that invokes the call. Is there really a method TODO.
I am also a bit confused with "Client Side WSDL" actually only the server does create a WSDL file, client only reads it (maybe you have some code generator that uses the WSDL to generate some code .. but the client has no WSDL).
Further you should post a complete working example that can be run by somebody else, espacially with such a specific problem. Otherwise I am afraid hardly anybody will push you to the right direction.