When running mvn compile, I got this:

[INFO] [xfire:wsgen {execution: default}]
[INFO] Executing XFire WsGen task with url: http://ws.xwebservices.com/XWebEmail
[ERROR] log4j:WARN No appenders could be found for logger (org.codehaus.xfire.ge
[ERROR] log4j:WARN Please initialize the log4j system properly.
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] javax/wsdl/extensions/UnknownExtensibilityElement
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NoClassDefFoundError: javax/wsdl/extensions/UnknownExtensibilityElemen
        at org.codehaus.xfire.gen.Wsdl11Generator.generate(Ws dl11Generator.java:
        at org.codehaus.xfire.gen.WsGenTask.execute(WsGenTask .java:44)
        at org.codehaus.mojo.xfire.WsgenMojo.exec(WsgenMojo.j ava:184)
        at org.codehaus.mojo.xfire.WsgenMojo.execute(WsgenMoj o.java:103)
        at org.apache.maven.plugin.DefaultPluginManager.execu teMojo(DefaultPlugi
        at org.apache.maven.lifecycle.DefaultLifecycleExecuto r.executeGoals(Defa
        at org.apache.maven.lifecycle.DefaultLifecycleExecuto r.executeGoalWithLi
        at org.apache.maven.lifecycle.DefaultLifecycleExecuto r.executeGoal(Defau
        at org.apache.maven.lifecycle.DefaultLifecycleExecuto r.executeGoalAndHan
        at org.apache.maven.lifecycle.DefaultLifecycleExecuto r.executeTaskSegmen
        at org.apache.maven.lifecycle.DefaultLifecycleExecuto r.execute(DefaultLi
        at org.apache.maven.DefaultMaven.doExecute(DefaultMav en.java:333)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven .java:126)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:2 82)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAcces
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.classworlds.Launcher.launchEnhanced(L auncher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher. java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode (Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.ja va:375)

Can anyone help please?

Don't bother sorry!

I just cleaned my project and my repository and rebuilt everything from the beginning. And guess what, it works!

Cheers!