Fixed by adding the standard-jaxws-client-config.xml with the following content:
<?xml version="1.0" encoding="UTF-8"?>
<!-- $Id: standard-jaxws-client-config.xml 3797 2007-07-04 11:33:22Z thomas.diesler@jboss.com
$ -->
<jaxws-config xmlns="urn:jboss:jaxws-config:2.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:javaee="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="urn:jboss:jaxws-config:2.0 jaxws-config_2_0.xsd">
<client-config>
<config-name>Standard Client</config-name>
<feature>http://org.jboss.ws/dispatch/validate</feature>
<property>
<property-name>http://org.jboss.ws/http#chunksize</property-name>
<property-value>0</property-value>
</property>
</client-config>
<client-config>
<config-name>HTTP 1.0 Client</config-name>
<feature>http://org.jboss.ws/dispatch/validate</feature>
</client-config>
<client-config>
<config-name>Standard WSAddressing Client</config-name>
<post-handler-chains>
<javaee:handler-chain>
<javaee:protocol-bindings>##SOAP11_HTTP</javaee:protocol-bindings>
<javaee:handler>
<javaee:handler-name>WSAddressing Handler</javaee:handler-name>
<javaee:handler-class>org.jboss.ws.extensions.addressing.jaxws.WSAddressingClientHandler
</javaee:handler-class>
</javaee:handler>
</javaee:handler-chain>
</post-handler-chains>
</client-config>
<client-config>
<config-name>Standard WSSecurity Client</config-name>
<post-handler-chains>
<javaee:handler-chain>
<javaee:protocol-bindings>##SOAP11_HTTP</javaee:protocol-bindings>
<javaee:handler>
<javaee:handler-name>WSSecurityHandlerOutbound
</javaee:handler-name>
<javaee:handler-class>org.jboss.ws.extensions.security.jaxws.WSSecurityHandlerClient
</javaee:handler-class>
</javaee:handler>
</javaee:handler-chain>
</post-handler-chains>
</client-config>
</jaxws-config>