Error, found "&lt;" and not "<"

Hello:  I have a webservice into Weblogic 12c. This webservice's function, it`s send one request to another Webservice and this response. This Webservice has been tested in another servers like Apache Tomcat and works correctly,  but when this webservices is deployed into weblogic, the response of the other webservice it`s difference and get an error response like this: <?xml version="1.0" encoding="UTF-8"?> <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">          <soapenv:Body>                <soapenv:Fault>                         <faultcode>soapenv:Server</faultcode>                         <faultstring>ERROR DETECTADO</faultstring>                         <faultactor>DPP07(13)</faultactor>                        <errorDetail>                               <Source>/ws/i01/oba/SMC00011</Source>                               <TransactionID>DPP07.39739357.1490281864012</TransactionID>                               <ErrorDesc>Schema validation error. cvc-particle 3.1: in element {