Problems with class version and WebServices

Hello!

I'm trying to learn how webservices work with WebLogic 8.1.6.

I have manage to generate a service upon e Stateless EJB and also generate a client jar with these ant-tasks:

    <target name="nameswebservice_server" depends="taskdef" >
        <delete dir="/home/fredrik/Applications/Eclipse/EclipseIDEforJavaEEDevelopers/workspace/nameswebservices/temp" />
        <mkdir dir="/home/fredrik/Applications/Eclipse/EclipseIDEforJavaEEDevelopers/workspace/nameswebservices/temp" />
        <copy todir="/home/fredrik/Applications/Eclipse/EclipseIDEforJavaEEDevelopers/workspace/nameswebservices/temp" file="/home/fredrik/Applications/Eclipse/EclipseIDEforJavaEEDevelopers/workspace/nameswebservices/WebContent/WEB-INF/lib/namesejb.jar"/>
        <servicegen
          destEar="/home/fredrik/Applications/Eclipse/EclipseIDEforJavaEEDevelopers/workspace/nameswebservices/temp/nameswebservice.ear"
          warName="nameswebservice.war"
          contextURI="nameswebservice">
          <service
            ejbJar="/home/fredrik/Applications/Eclipse/EclipseIDEforJavaEEDevelopers/workspace/nameswebservices/temp/namesejb.jar"
            targetNamespace="http://localhost:7011/NamesWebService"
            serviceName="NamesWebService"
            serviceURI="/NamesWebService"
            generateTypes="True"
            expandMethods="True" >
          </service>
        </servicegen>
      </target>

      <target name="nameswebservice_client" depends="taskdef">
          <property name="wsdlUrl"
              value="http://localhost:7011/nameswebservice/NamesWebService?WSDL" />

              <clientgen wsdl="${wsdlUrl}" packageName="nameswebservice.client"
            clientJar="/home/fredrik/Applications/Eclipse/EclipseIDEforJavaEEDevelopers/workspace/nameswebapplication/WebContent/WEB-INF/lib/nameswebservice_client.jar" >
            <classpath>
                <pathelement path="/home/fredrik/Applications/bea/weblogic81/server/lib/weblogic.jar"/>
                <pathelement path="/home/fredrik/Applications/bea/weblogic81/server/lib/webservices.jar"/>
              </classpath>
              </clientgen>
        </target>

The service has no problem to be deployed on the server side.

But when I try to call the webservice I get:
...WEB-INF/classes/nameswebservice/client/NamesWebService_Impl.class
class file has wrong version 50.0, should be 48.0

I guess my generation (of at least the client) has in some way become version 1.5 but I just can run 1.4 in my weblogic.

I guess I need to convert my class files to 1.4, but I can not find any attribute to set in the ant tasks above that mange that.

So if any one got a clue of how to be able to generate everything for 1.4 please let me know!

Best regards
Fredrik