Display error page using web.xml error-page

I need to dispaly error page when IOException in thrown. How to do that with web.xml error-page tag?
start.jsf
public String doButton1Action() throws IOException{
          String value = getText1().getValue().toString();
          try {
               File f = new File(value);          
               InputStream in = new FileInputStream(f);
          } catch (IOException e) {
               throw new IOException();
          return "success";
     }I have this in web.xml:
     <error-page>
          <exception-type>java.io.IOException</exception-type>
          <location>/ioerror.jsp</location>
     </error-page>

I tried that earlier but then I get error just printed to console and HTTP 500 - Internal server error -page, bubt not my errorPage.
[26.1.2007 21:19:16:543 EET] 00000038 jsf           E com.sun.faces.lifecycle.InvokeApplicationPhase execute #{pc_Start.doButton1Action}: javax.faces.el.EvaluationException: java.io.FileNotFoundException: c:\temp\ghostfile.jpg
                                 javax.faces.FacesException: #{pc_Start.doButton1Action}: javax.faces.el.EvaluationException: java.io.FileNotFoundException: c:\temp\ghostfile.jpg
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:79)
     at javax.faces.component.UICommand.broadcast(UICommand.java:312)
     at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:298)
     at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:412)
     at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:220)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:91)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
     at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:966)
     at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
     at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:463)
     at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:92)
     at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:744)
     at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1433)
     at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:93)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:394)
     at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)
     at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:152)
     at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:213)
     at com.ibm.io.async.AbstractAsyncFuture.fireCompletionActions(AbstractAsyncFuture.java:195)
     at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
     at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:194)
     at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:741)
     at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:863)
     at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1510)
Caused by: javax.faces.el.EvaluationException: java.io.FileNotFoundException: c:\temp\ghostfile.jpg
     at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:131)
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:73)
     ... 25 more

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