JSF :: Target Unreachable - Identifier Resolved To Null

I am trying to implement the JSF 2.0 project with Primefaces from one of the tutorial, i con login with only jsf but not when i use primeface where i am getting following error.

Error Log

HTTP Status 500 - /login2.xhtml @23,98 value="#{employee.userName}": Target Unreachable, identifier 'employee' resolved to null type Exception report
message /login2.xhtml @23,98 value="#{employee.userName}": Target Unreachable, identifier 'employee' resolved to null description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: /login2.xhtml @23,98 value="#{employee.userName}": Target Unreachable, identifier 'employee' resolved to null
javax.faces.webapp.FacesServlet.service(FacesServlet.java:321)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)root cause

[Code] ....

Note The full stack trace of the root cause is available in the Apache Tomcat/7.0.57 logs. in Apache Tomcat/7.0.57

Employee.java

package com.login.sample;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.annotation.PostConstruct;

[Code] ....

I am trying to create a login page with a database in which i am getting this error. I am not getting this bean properties.