[Building Sakai] Wicket Datatable in sakai error

[Antonio molina]

HI/Hola.
-I use sakai archetype wicket.-I use this example about database -->https://cwiki.apache.org/WICKET/simple-sortable-datatable-example.html.
-generates this error:           org.sakaiproject.portal.api.PortalHandlerException: org.apache.wicket.WicketRuntimeException: Method onLinkClicked of interface org.apache.wicket.markup.html.link.ILinkListener targeted at component [MarkupContainer [Component id = secondLink]] threw an exception
    at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:862)
caused by: org.apache.wicket.WicketRuntimeException: Method onLinkClicked of interface org.apache.wicket.markup.html.link.ILinkListener targeted at component [MarkupContainer [Component id = secondLink]] threw an exception
    at org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:73)
caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
caused by: java.lang.NoClassDefFoundError: org/apache/wicket/extensions/markup/html/repeater/data/table/ISortableDataProvider
    at org.apache.wicket.markup.html.link.Link.onLinkClicked(Link.java:225)
caused by: java.lang.ClassNotFoundException: org.apache.wicket.extensions.markup.html.repeater.data.table.ISortableDataProvider
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1438)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1284)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
    at org.sakaiproject.tool.pages.BasePage$2.onClick(BasePage.java:72)
    at org.apache.wicket.markup.html.link.Link.onLinkClicked(Link.java:225)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
Any solution??.Thanks/Gracias.


 		 	   		  
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