jstl显示无效，跳不进<c:choose><c:if>等标签
用myEclipse 进行debug时凡是进到如<c:if></c:if><c:choose></c:choose>等标签时直接由开始标签(如<c:if>)跳到跳到结束标签(如</c:if>)，中间的代码不执行。请问为什么？sessionUser 是取到值的
加班到十一点多都没搞出来，希望大侠们能指导一下小弟~~~下面是部分代码
<%@ page contentType="text/html; charset=utf-8"%><%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c"%><%@ taglib uri="http://java.sun.com/jstl/fmt_rt" prefix="fmt" %><%@page import="com.fa.custom.entity.User"%><% User sessionUser = (User)session.getAttribute("SESSION_USER"); %> <html> <head> <script type="text/javascript" src="../js/jquery-1.3.2.min.js"></script> <script type="text/javascript" src="../js/login.js"></script><link href="../css/style.css" rel="stylesheet" type="text/css" /><link href="../css/global.css" rel="stylesheet" type="text/css" /> <title> </title> </head> <body> <div class="jobl_bot" ><c:choose> <c:when test="${sessionUser != null}"> <div class="per_name"><span>${sessionUser.name}</span>，欢迎访问！</div> <div class="per_listlink"> <a href="../job/user_applyJob.do">我应聘的职位</a>|<a href="../job/user_updateResume.do">编辑简历</a><br /> <a href="../job/job_updatePwd.do" class="update_pwd">修改密码</a>|<a href="../job/job_LogOut.do">退出登录</a> </div> </c:when> <c:otherwise> <form name="form1" id="form1" action="../job/job_login.do" method="post" > <div class="jlc_line"> <div class="jlc_left">用户账号</div> <div class="jlc_right"><input name="userName" type="text" class="input_joblogin" /></div> </div> <div class="jlc_line"> <div class="jlc_left">密码</div> <div class="jlc_right"><input name="userPass" type="password" class="input_joblogin" /></div> </div> <div class="jlc_line"> <div class="jlc_left">验证码</div> <div class="jlc_right yzmbg"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="input_yzm"> <input name="checkCode" type="text" class="yzm_input" /> </td> <td><a onclick="javascript:refreshCode();" href="javascript:;"> <img align="bottom" id="checkCode" alt="验证码" /></a> </td> </tr> </table> </div> </div> <div class="jlc_loginbtn"> <input type="image" id="btnLogin" src="../images/jobsys/zpindex_29.gif" width="159" height="29" border="0" alt="" /> </div> <div class="jlc_txtlink"><a href="../job/job_registration.do">会员注册</a> | <a href="../job/job_backPwd.do">找回密码</a></div> </form> </c:otherwise></c:choose></div></body></html>