ZK - Open Source Ajax Java Framework

Hello I have follow instructions to update ZK 3.5 to 5.05 and I have also updated Zk Studio from 0.92 to 1.02.
I compile the application, i have make the new war and it's deployed. Tomcat 5.5 give me the follow error, can you help me?

StandardWrapper.Throwable
org.zkoss.util.IllegalSyntaxException: <renderer-class> es requerido ([SYS jar:file:/C:/Archivos%20de%20programa/Apache%20Software%20Foundation/Tomcat%205.5/webapps/ExpsWS/WEB-INF/lib/zml.jar!/metainfo/zk/lang.xml line 14 col 11]).
at org.zkoss.idom.util.IDOMs.getRequiredElementValue(IDOMs.java:79)
at org.zkoss.zk.ui.metainfo.DefinitionLoaders.parseLang(DefinitionLoaders.java:232)
at org.zkoss.zk.ui.metainfo.DefinitionLoaders.load0(DefinitionLoaders.java:152)
at org.zkoss.zk.ui.metainfo.DefinitionLoaders.load(DefinitionLoaders.java:128)
at org.zkoss.zk.ui.metainfo.LanguageDefinition.init(LanguageDefinition.java:301)
at org.zkoss.zk.ui.metainfo.LanguageDefinition.getAll(LanguageDefinition.java:280)
at org.zkoss.zk.ui.http.WebManager.getCWRURLPrefix(WebManager.java:223)
at org.zkoss.zk.ui.http.WebManager.<init>(WebManager.java:184)
at org.zkoss.zk.ui.http.DHtmlLayoutServlet.init(DHtmlLayoutServlet.java:111)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:831)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:720)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:448)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
08-abr-2011 12:26:49 org.apache.catalina.core.StandardContext loadOnStartup

Has anyone got a problem with the render class? I don't know how to solve it, If someone can help me, please

Problem solved copying libs of the Zkdemo5.0 instead Zk 5.06 libs