Error - javax.faces.FacesException: javax.faces.FacesException: Can't instantiate class: 'com.barshid.amlakSite.view.pageBeen.AgahiMainPage'.. class com.barshid.amlakSite.view.pageBeen.AgahiMainPage : java.lang.NullPointerException

javax.faces.el.EvaluationException: javax.faces.FacesException: javax.faces.FacesException: Can't instantiate class: 'com.barshid.amlakSite.view.pageBeen.AgahiMainPage'.. class com.barshid.amlakSite.view.pageBeen.AgahiMainPage : java.lang.NullPointerException
	at com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:206)
	at com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:154)
	at org.ajax4jsf.taglib.html.facelets.KeepAliveHandler.apply(KeepAliveHandler.java:76)
	at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
	at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:295)
	at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:165)
	at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
	at com.sun.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:109)
	at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
	at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
	at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
	at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
	at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
	at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:510)
	at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:553)
	at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
	at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:216)
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
	at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:825)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:731)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:526)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
	at java.lang.Thread.run(Unknown Source)
Caused by: javax.faces.FacesException: javax.faces.FacesException: Can't instantiate class: 'com.barshid.amlakSite.view.pageBeen.AgahiMainPage'.. class com.barshid.amlakSite.view.pageBeen.AgahiMainPage : java.lang.NullPointerException
	at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:266)
	at com.sun.faces.el.VariableResolverImpl.resolveVariable(VariableResolverImpl.java:78)
	at org.apache.myfaces.custom.redirectTracker.RedirectTrackerVariableResolver.resolveVariable(RedirectTrackerVariableResolver.java:41)
	at org.apache.myfaces.custom.security.SecurityContextVariableResolver.resolveVariable(SecurityContextVariableResolver.java:45)
	at com.sun.faces.el.impl.NamedValue.evaluate(NamedValue.java:125)
	at com.sun.faces.el.impl.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:243)
	at com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:173)
	... 41 more
Caused by: javax.faces.FacesException: Can't instantiate class: 'com.barshid.amlakSite.view.pageBeen.AgahiMainPage'.. class com.barshid.amlakSite.view.pageBeen.AgahiMainPage : java.lang.NullPointerException
	at com.sun.faces.config.ManagedBeanFactory.newInstance(ManagedBeanFactory.java:209)
	at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:256)
	... 47 more
Caused by: java.lang.ClassNotFoundException: class com.barshid.amlakSite.view.pageBeen.AgahiMainPage : java.lang.NullPointerException
	at java.beans.Beans.instantiate(Unknown Source)
	at java.beans.Beans.instantiate(Unknown Source)
	at com.sun.faces.config.ManagedBeanFactory.newInstance(ManagedBeanFactory.java:203)
	... 48 more
Caused by: java.lang.NullPointerException
	at com.barshid.amlakSite.view.pageBeen.AgahiMainPage.<init>(AgahiMainPage.java:66)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at java.lang.Class.newInstance0(Unknown Source)
	at java.lang.Class.newInstance(Unknown Source)
	... 51 more

<AjaxViewRoot id="_viewRoot" immediate="false" locale="en_US" renderKitId="HTML_BASIC" renderRegionOnly="false" rendered="true" selfRendered="false" submitted="false" transient="false" viewId="/AgahiPage.jspx">
<!--
  Created by IntelliJ IDEA.
  User: Mohsen
  Date: Dec 30, 2008
  Time: 8:23:35 AM
  To change this template use File | Settings | File Templates.
--><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:jsp="http://java.sun.com/JSP/Page">
<Stylesheet filtered="false" id="_id2" inline="false" path="../templates/tpl_lightblue/css/template.css" rendered="true" transient="false"/>
<head id="head1">
    <style id="styl1" type="text/css">

        .header {

            text-align: center;
            margin-bottom: 1px;
            font-family: tahoma;
            width: 100%;
            height: 30px;
            padding: 10px;*/
            font-size: 14px;*/
            font-weight: bold;

        }

        .font {
            font-family: Tahoma;
            font-size: 120%;

        }
    </style>
    <title>آگهي هاي ثبتي</title>
</head>


<!--................status.................-->
<HtmlAjaxStatus forceId="false" id="ajaxStatusTemplateId" onstart="Richfaces.showModalPanel('reportModal')" onstop="Richfaces.hideModalPanel('reportModal')" rendered="true" transient="false">
start<p align="center" style="font-family:'Tahoma';color:#FF0000;font-size:10px">لطفا چند لحظه صبر کنيد </p>
</HtmlAjaxStatus>
<HtmlModalPanel autosized="false" controlsClass="" headerClass="" height="40" id="reportModal" immediate="false" keepVisualState="false" left="auto" localValueSet="false" minHeight="-1" minWidth="-1" moveable="true" onhide="" onshow="" rendered="true" required="false" resizeable="true" showWhenRendered="false" top="auto" transient="false" tridentIVEngineSelectBehavior="disable" valid="true" width="40" zindex="100">
header<HtmlGraphicImage id="_id5" ismap="false" rendered="true" transient="false" url="/image/ajax-loader.gif" value="/image/ajax-loader.gif"/>
</HtmlModalPanel>
<!--......................-->
</AjaxViewRoot>

An Error Occurred:

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