How to do parameter binding in web dynpro

Question

My Web Service expects an input  object called "Token " which consistes of
Token id, Provider -
both strings
Web service is checkUser
I did mapping and all those things . In my UI(automatically created), i'll take the input from user for Token id and Provider. and on action of button iam calling the web service like this
wdContext.currentRequest_CheckUser_checkUserElement().modelObject().execute();
wdContext.nodeResponse().invalidate();
in init method i have binded the request like this
Request_CheckUser_checkUser req = new Request_CheckUser_checkUser();
wdContext.nodeRequest_CheckUser_checkUser().bind(req);
This were the 4 lines of code . Now i get excpetion like this
Service call exception; nested exception is: com.sap.engine.services.webservices.jaxrpc.exceptions.XmlMarshalException: XML Serialization Error. Property [Token] of class [com.intellect.model.proxies.types.CheckUserRq] must exist and can not be null. This is required by schema description.
pls help

Answer 1

Hi sujesh,
U have to set the internet settings like ip address and all in the <b>Logical ports</b>. u can find this when u import ur webservice model u 'll get this logical ports in the tree structure just below the model classes.
and one more thing just try the url of the webservice in the internet explorer if u r able to open it or not.
if u r able to do this then, how r u accessing ur internet?? where r u deploying ur application ?? is that server having that internet access and through which ip??
just check all this and let me know...
Sirisha.