jspSmaruplod 文件上传的问题

使用jspSmaruplod上传文件<%@ page contentType="text/html; charset=gb2312" language="java" 
import="java.util.*,com.jspsmart.upload.*" errorPage="" %>
<html>
<head>
<title>文件上传处理页面</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head><body>
<%
SmartUpload su = new SmartUpload();

su.initialize(pageContext);
su.upload();
su.save("/upload");
out.println("文件上传成功！<br>");

out.println("TEST="+su.getRequest().getParameter("TEST")
+"<BR><BR>");
%>
</body>
</html>用Tomcat,结果初始化就出问题,提示出错:C:\Program Files\Tomcat 5.0\work\Catalina\localhost\cert0506\org\apache\jsp\chengnuoupload_005fdo_jsp.java:57: cannot resolve symbol
symbol  : method initialize (javax.servlet.jsp.PageContext)
location: class com.jspsmart.upload.SmartUpload
su.initialize(pageContext);
          ^
1 error
请问怎么处理?