JasperReport ClassNotFound

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jstl/core_rt" prefix="c"%>
<%@taglib uri="http://java.sun.com/jstl/sql_rt" prefix="sql"%>

<%@ page import="java.sql.*,java.util.*,java.io.*"%>
<%@ page import="net.sf.jasperreports.engine.JasperRunManager" %>

<%@ page import="java.util.Map,java.util.HashMap" %>
<%@ page import="java.io.*" %>

<%
    Class.forName("org.firebirdsql.jdbc.FBDriver");
    String url = "jdbc:firebirdsql:****/3050:/firebird/banco.gdb?lc_ctype=ISO8859_1";      
    String user = "****";
    String password = "******";
    Connection c = DriverManager.getConnection( url, user, password );
    
    // File jas = new File("/home/ibs/webapps/DPVAT/relatorio/aviso_sinistro/teste.jasper");
    
    Map parameters = new HashMap();
    parameters.put("CD_DAMS",new Integer(request.getParameter("CD_DAMS")));
    parameters.put("CD_FILIAL",new Integer(1));
    byte[] bytes = JasperRunManager.runReportToPdf("/home/ibs/webapps/DPVAT/relatorio/aviso_sinistro/teste.jasper", parameters, c);
    
    response.setContentType("Content-Type: application/force-download");
    response.setContentType("Content-Disposition: inline; filename= teste.jsp");
    response.setContentLength(bytes.length);
    
    ServletOutputStream ouputStream = response.getOutputStream();
    
    ouputStream.write(bytes, 0, bytes.length);
    ouputStream.flush();
    ouputStream.close();
%>

javax.servlet.ServletException
	org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
	org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
	org.apache.jsp.relatorio.aviso_005fsinistro.aviso_005fsinistro_005fdpvat_jsp._jspService(aviso_005fsinistro_005fdpvat_jsp.java:94)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

java.lang.NoClassDefFoundError
	java.lang.Class.forName0(Native Method)
	java.lang.Class.forName(Class.java:141)
	java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:62)
	net.sf.jasperreports.engine.util.JRGraphEnvInitializer.initializeGraphEnv(JRGraphEnvInitializer.java:58)
	net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:315)
	net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:92)
	net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:74)
	net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:147)
	net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:57)
	net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:402)
	net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:234)
	net.sf.jasperreports.engine.JasperRunManager.runReportToPdf(JasperRunManager.java:203)
	org.apache.jsp.relatorio.aviso_005fsinistro.aviso_005fsinistro_005fdpvat_jsp._jspService(aviso_005fsinistro_005fdpvat_jsp.java:77)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)