Cannot find bean: "list" in any scope

public class MemberSearchAction extends Action {
    public ActionForward execute(ActionMapping actionMapping,
            ActionForm actionForm, HttpServletRequest request,
            HttpServletResponse response) {
        MemberForm memberForm = (MemberForm) actionForm;
        String mobilephone = memberForm.getInMobilephone();
        DataSource ds = getDataSource(request);
        DBManager dbm = new DBManager(ds);
        DBSqlManager dbsm = new DBSqlManager();
        HttpSession session = request.getSession();
        ActionMessages errors = new ActionMessages();        List<MemberForm> list = new ArrayList<MemberForm>();
        String sql = null;
        if (mobilephone == null || mobilephone.equals("")) {
            //查询全部会员信息
            sql = SQL.SQL_MEM_QUE;
                  } else if (IsNumber.isNumber(mobilephone)) {
                        sql = SQL.SQL_MEM_QUE + " where mobile_phone like '%" + mobilephone
                    + "%';";
            System.out.print(sql);        } else {
                  errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(
                    "errors.member.mobilephone"));
            if (!errors.isEmpty()) {
                saveErrors(request, errors);
                System.out.println("============================");
            }
        }
        ResultSet rs = dbsm.display(sql, dbm);        try {
            while(rs.next()) {
                MemberForm form = new MemberForm();
                form.setMember_id(rs.getLong("member_id"));
                form.setOutMobilephone(rs.getString("mobile_phone"));
                form.setProduct_name_cn(rs.getString("product_name_cn"));
                form.setClinet_code(rs.getString("clinet_code"));
                form.setLast_login_date(rs.getString("last_login_date"));
                form.setLogin_count(rs.getInt("login_count"));
                form.setLocation_name(rs.getString("location_name"));
                list.add(form);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
                       try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
                       dbm.close();
        }        request.setAttribute("list", list);        // 页面跳转
        return actionMapping.findForward("toMemList");
    }
}JSP:
<logic:iterate id="list" name="list">
                    <tr onClick="selectThis(this,'datalist');" onDblClick="">
                        <td nowrap class="listno">
                            <input type="checkbox">
                        </td>
                        <td nowrap>
                            <bean:write name="list" property="mobile_phone" />
                        </td>
                        <td nowrap>
                            <bean:write name="list" property="product_name_cn" />
                        </td>
                        <td nowrap>
                            <bean:write name="list" property="location_name" />
                        </td>
                        <td nowrap>
                            <bean:write name="list" property="clinet_code" />
                        </td>
                        <td nowrap>
                            <bean:write name="list" property="login_count" />
                        </td>
                        <td nowrap>
                            <bean:write name="list" property="last_login_date" />
                        </td>
                    </tr>
                </logic:iterate>struts:    <action    name="MemberForm" path="/memberSearch" type="com.cn.business.mem.actions.MemberSearchAction">
        <forward name="toMemList" path="/WEB-INF/jsp/mem/memberinfo.jsp" />
        </action>日志：
2011-7-24 15:42:09 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet action threw exception
javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
at org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:935)
at org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:232)
at org.apache.jsp.WEB_002dINF.jsp.mem.memberinfo_jsp._jspService(memberinfo_jsp.java:240)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:659)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:457)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:395)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)