500 Servlet Exception

java.lang.NoClassDefFoundError
	at kr.co.corebase.eps.util.HandlerServlet.execute(HandlerServlet.java:52)
	at kr.co.corebase.eps.util.HandlerServlet.doGet(HandlerServlet.java:31)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:115)
	at kr.co.corebase.eps.util.HandlerServlet.service(HandlerServlet.java:41)
	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.hmux.HmuxRequest.handleRequest(HmuxRequest.java:419)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:388)
	at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:490)
	at com.caucho.util.ThreadPool.run(ThreadPool.java:423)
	at java.lang.Thread.run(Thread.java:534)

Resin-3.0.17 (built Thu, 22 Dec 2005 12:11:34 PST)