Problem with Integration Of Salesforce API's Through WebMeth

Hi,

We are integrating Salesforce with our application.
For this we are using Enterprise Web Services API Version 19.0 and WebMethod (wM Software AG- EAI Platform).
It seems webmethod is not able to convert the output parameter to expected document.
We are able to login to sales force which returns us url and session id.
Using this url and session id when I tries to call the queryAll API it gives us error

               "An error occurred while tracing.

                 com.wm.app.b2b.server.ServiceException: [ISS.0088.9139] Output parameters do not conform to   
                 targetOutputSignature: 
errorCode=VV-002
pathName=/tns:queryAllResponse/tns:result/tns:records[0]/ens:Client_Code__c
errorMessage=[ISC.0082.9026] Undefined Object found

errorCode=VV-002
pathName=/tns:queryAllResponse/tns:result/tns:records[0]/ens:IsDeleted
errorMessage=[ISC.0082.9026] Undefined Object found

errorCode=VV-002
pathName=/tns:queryAllResponse/tns:result/tns:records[0]/ens:Name
errorMessage=[ISC.0082.9026] Undefined Object found"

Query which I want to execute is “select Client_Code__c,Name, IsDeleted, Description, Id from Account Where Name=‘Test Customer’”

There must be many people who are using WebMethod to call Salesforce.
But I am not able to find the exact solution for above problem.
If anybody know how to solve this problem please reply.

Thanks and Regards,
Mayur

Which version of IS are you using?