Problem using a web service

[hemant_visal]

Dear All,
I am calling a .net assembly from a JSP page. I am doing so as below :
<%
String url = "TestForURLParamVB.exe";
response.sendRedirect(url + "?sessionID=" + session.getId());
%>

I have a web service written for storing, retrieving and deleting some xml file based on the session ID passed to it. I extract the session id using domain.GetData("APP_LAUNCH_URL"). I have added a web reference in the project.
Till this point, there is no problem. But once I try to initialise the web service object as :
Dim ws As New hemant.SessionWSService
It gives me an error as mentioned in the attached document. I am not able to get why it is searching for a config file.

If I excute the .net code directly ( without calling it from a jsp ) after commenting out the getData call, it is working fine and the necessary XML file is getting created. But once I try to use the getData call, it again gives the same error.
Any guess what is wrong. Is there any way out for this. Please help me out as this is urgent. Thanks in advance.
Hemant