Error when call BSSV webservice

Hi
I have a problem when I call BSSV from javascript.
My call from javascript is:

var xmlhttp = new XMLHttpRequest();
xmlhttp.open('POST', 'http://10.40.10.103:7101/context-root-JPR55ETI/LlamadaB55NCALLPort?wsdl', true);
//the following variable contains my xml soap request (that you can get thanks to SoapUI for example)
var sr =
'<?xml version = "1.0" encoding = "UTF-8"?><env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="http://JPR55ETI.bssv.e1.oracle/"><env:Header/><env:Body><ns1:llamadaB55NCALL><arg0><szDataStructureString_DSS>10096</szDataStructureString_DSS><szReportID9_RTID>R55NETIQ</szReportID9_RTID><szReportVersion_RTVE>NET0001</szReportVersion_RTVE></arg0></ns1:llamadaB55NCALL></env:Body></env:Envelope>';

xmlhttp.onreadystatechange = () => {
if (xmlhttp.readyState == 4) {
if (xmlhttp.status == 200) {

}
}
}
// Send the POST request
xmlhttp.setRequestHeader('Content-Type', 'text/xml; charset=UTF-8');
xmlhttp.setRequestHeader('SOAPAction', '');
xmlhttp.setRequestHeader('Host', '10.40.10.103:7101');
xmlhttp.setRequestHeader('Content-Length', '374');
xmlhttp.setRequestHeader('X-HTTPAnalyzer-Rules', '[email protected]:809');
xmlhttp.send(sr);

The wsdl I posted from JDE is:
http://10.40.10.103:7101/context-root-JPR55ETI/LlamadaB55NCALLPort?WSDL

But the status of response is 500 always, and the message of this error is Couldn't create SOAP message due to exception: XML reader error: com.ctc.wstx.exc.WstxEOFException: Unexpected EOF in prolog
at [row,col {unknown-source}]: [1,0]


Regards
 
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