Error parsing my XML response

I'm trying to get some data using Web Sevice Data Source utility on Jasper Studio 6.2.0 accroding to instrutions provided.

I get the response from my server, I added a field to be extracted from the response.

When I'm trting to refresh preview data on Data preview tab exception is occured:

Error while parsing the response from the server with language xml

The server has retruned the following response: 

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tcs="ENMAC/TCS">

   <soapenv:Header/>

   <soapenv:Body>

      <tcs:NPLInsertResponse>

         <tcs:NPLInsertResponseStc>

            <tcs:Status>123</tcs:Status>

         </tcs:NPLInsertResponseStc>

      </tcs:NPLInsertResponse>

   </soapenv:Body>

</soapenv:Envelope>

Response Code: 200

Server request information 

POST http://localhost:8088/mockTCSSoap/ HTTP/1.1

Additional informations: 

net.sf.jasperreports.engine.JRException: Xalan XPath selection failed. Expression: /soapenv:Envelope/soapenv:Body/tcs:NPLInsertResponse/tcs:NPLInsertResponseStc

at com.jaspersoft.webservice.data.query.WebServiceQueryExecuter.createDatasource(WebServiceQueryExecuter.java:187)

at com.jaspersoft.webservice.data.query.WebServiceQueryExecuter.createDatasource(WebServiceQueryExecuter.java:1)

at net.sf.jasperreports.engine.fill.JRFillDataset.createQueryDatasource(JRFillDataset.java:1129)

at net.sf.jasperreports.engine.fill.JRFillDataset.initDatasource(JRFillDataset.java:696)

at net.sf.jasperreports.engine.fill.BaseReportFiller.setParameters(BaseReportFiller.java:437)

at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:526)

at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:164)

at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:474)

at com.jaspersoft.studio.data.reader.DatasetReader.start(DatasetReader.java:225)

at com.jaspersoft.studio.property.dataset.dialog.DataPreviewTable$4.run(DataPreviewTable.java:241)

at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

Caused by: net.sf.jasperreports.engine.JRException: Xalan XPath selection failed. Expression: /soapenv:Envelope/soapenv:Body/tcs:NPLInsertResponse/tcs:NPLInsertResponseStc

at net.sf.jasperreports.engine.util.xml.XalanXPathExecuter.selectNodeList(XalanXPathExecuter.java:59)

at net.sf.jasperreports.engine.data.JRXmlDataSource.moveFirst(JRXmlDataSource.java:420)

at net.sf.jasperreports.engine.data.JRXmlDataSource.<init>(JRXmlDataSource.java:188)

at net.sf.jasperreports.engine.data.JRXmlDataSource.<init>(JRXmlDataSource.java:197)

at com.jaspersoft.webservice.data.xml.WSXmlDataSource.<init>(WSXmlDataSource.java:104)

at com.jaspersoft.webservice.data.xml.XmlQueryExecuterWrapper.createDatasource(XmlQueryExecuterWrapper.java:77)

at com.jaspersoft.webservice.data.query.WebServiceQueryExecuter.createDatasource(WebServiceQueryExecuter.java:177)

... 10 more

Caused by: org.apache.xpath.domapi.XPathStylesheetDOM3Exception: Prefix must resolve to a namespace: soapenv

at org.apache.xpath.compiler.XPathParser.errorForDOM3(XPathParser.java:655)

at org.apache.xpath.compiler.Lexer.mapNSTokens(Lexer.java:647)

at org.apache.xpath.compiler.Lexer.tokenize(Lexer.java:274)

at org.apache.xpath.compiler.Lexer.tokenize(Lexer.java:98)

at org.apache.xpath.compiler.XPathParser.initXPath(XPathParser.java:112)

at org.apache.xpath.XPath.<init>(XPath.java:178)

at org.apache.xpath.CachedXPathAPI.eval(CachedXPathAPI.java:288)

at org.apache.xpath.CachedXPathAPI.selectNodeList(CachedXPathAPI.java:222)

at org.apache.xpath.CachedXPathAPI.selectNodeList(CachedXPathAPI.java:202)

at net.sf.jasperreports.engine.util.xml.XalanXPathExecuter.selectNodeList(XalanXPathExecuter.java:57)

... 16 more

Does anybody know how to fix this problem?