Hello List

I am using Geoserver 2.1 beta, I would install GeoServer proxy extension 
following tutor of this 
link http://geoserver.org/display/GEOS/GeoServer+Proxy+Extension everything 
seemed to be fine, when I restated GeoServer and clicked to "Proxy Admin Page" 
the errors appears as bellows:

HTTP ERROR: 500
class org.geoserver.web.proxy.HostnameProvider overrides final method 
model.(Ljava/lang/Object;)Lorg/apache/wicket/model/IModel;
RequestURI=/geoserver/web/
Caused by:
java.lang.VerifyError: class org.geoserver.web.proxy.HostnameProvider overrides 
final method model.(Ljava/lang/Object;)Lorg/apache/wicket/model/IModel;         
at 
java.lang.ClassLoader.defineClass1(Native Method)       at 
java.lang.ClassLoader.defineClassCond(Unknown Source)   at 
java.lang.ClassLoader.defineClass(Unknown Source)       at 
java.security.SecureClassLoader.defineClass(Unknown Source)     at 
java.net.URLClassLoader.defineClass(Unknown Source)     at 
java.net.URLClassLoader.access$000(Unknown Source)      at 
java.net.URLClassLoader$1.run(Unknown Source)   at 
java.security.AccessController.doPrivileged(Native Method)      at 
java.net.URLClassLoader.findClass(Unknown Source)       at 
org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:366)
 
        at 
org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)
 
        at java.lang.Class.getDeclaredConstructors0(Native Method)      at 
java.lang.Class.privateGetDeclaredConstructors(Unknown Source)  at 
java.lang.Class.getConstructor0(Unknown Source)         at 
java.lang.Class.getConstructor(Unknown Source)  at 
org.apache.wicket.session.DefaultPageFactory.constructor(DefaultPageFactory.java:119)
        at 
org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:53)
 
        at 
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:298)
        at 
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:320)
        at 
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:234)
        at 
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
        at 
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250) 
        at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)  at 
org.apache.wicket.RequestCycle.steps(RequestCycle.java:1436)    at 
org.apache.wicket.RequestCycle.request(RequestCycle.java:545)   at 
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:484)       
at 
org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)     
at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:707)    at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:820)    at 
org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:158)
        at 
org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
        at 
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
        at 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
        at 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809)
        at 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
        at 
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)         
at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:820)    at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)  at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
        at 
org.geoserver.filters.ThreadLocalsCleanupFilter.doFilter(ThreadLocalsCleanupFilter.java:23)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
        at 
org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:68)
        at 
org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101)
        at 
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
        at 
org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:64)
        at 
org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101)
        at 
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
        at 
org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:64)
        at 
org.springframework.security.ui.basicauth.BasicProcessingFilter.doFilterHttp(BasicProcessingFilter.java:174)
        at 
org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
 .............................
..............................
at 
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:828)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)  at 
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)        at 
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)        at 
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)    
at 
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:450) 

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Could you please tell me what is problem or I have to plugin some extension 
file 
to fix said problem.

Thanks  

Quang 


      
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