WebService XML Result set Problem

Hi ,

i have a problem on Data Services about Webservice.

When i add a new Function Call , i choose webservice from DataStore then next screen matching shema.it is ok.

but when i pass this screen, webService result set shown 5 columns for result but when i check on SAOPUI , SOAPUI shown 6 results.

Because of this Data Services shown fail.

Help please,

Thanks