VelocityServlet : Error processing the template

java.lang.Exception: You must override VelocityServlet.handleRequest( Context)  or VelocityServlet.handleRequest( HttpServletRequest,  HttpServletResponse, Context)
java.lang.Exception: You must override VelocityServlet.handleRequest( Context)  or VelocityServlet.handleRequest( HttpServletRequest,  HttpServletResponse, Context)
	at org.apache.velocity.servlet.VelocityServlet.handleRequest(VelocityServlet.java:624)
	at org.apache.velocity.servlet.VelocityServlet.handleRequest(VelocityServlet.java:590)
	at org.apache.velocity.servlet.VelocityServlet.doRequest(VelocityServlet.java:372)
	at org.apache.velocity.servlet.VelocityServlet.doGet(VelocityServlet.java:333)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:115)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:92)
	at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:106)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:178)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:268)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:389)
	at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:507)
	at com.caucho.util.ThreadPool.run(ThreadPool.java:433)
	at java.lang.Thread.run(Thread.java:534)