JBoss SOA-P Webservice throws Content is not allowed in prolog

Issue

• SOAP message parse error

ERROR [STDERR] [Fatal Error] :1:1: Content is not allowed in prolog.
ERROR [org.jboss.ws.core.jaxws.SOAPFaultHelperJAXWS] SOAP request exception
org.jboss.ws.core.CommonSOAPFaultException: org.xml.sax.SAXParseException: Content is not allowed in prolog.
at org.jboss.ws.core.soap.EnvelopeBuilderDOM.build(EnvelopeBuilderDOM.java:93)
at org.jboss.ws.core.soap.MessageFactoryImpl.createMessage(MessageFactoryImpl.java:266)
at org.jboss.ws.core.soap.MessageFactoryImpl.createMessage(MessageFactoryImpl.java:185)
at org.jboss.wsf.stack.jbws.RequestHandlerImpl.processRequest(RequestHandlerImpl.java:402)
at org.jboss.wsf.stack.jbws.RequestHandlerImpl.handleRequest(RequestHandlerImpl.java:286)
at org.jboss.wsf.stack.jbws.RequestHandlerImpl.doPost(RequestHandlerImpl.java:196)