Ext3.1版本 GRID 列表的store接受不到json格式的数据！解决方案

Ext3.1版本 GRID 列表的store接受不到json格式的数据！
rt   郁闷  store 在接收json格式数据之后传进来的值没有进到store的data里面去 而是进到store的json里面去了 求大能帮助 ， 如下代码：

     var cm=new Ext.grid.ColumnModel([

        { header: "ID",dataIndex:"ID",width:'100px'},

        { header: "用户ID",dataIndex:"USERID",width:'100px',hidden:true},

        { header: "用户",dataIndex:"USERNAME",width:'200px'},

        { header: "密码",dataIndex:"PASSWORD",width:'100px',hidden:true},

        { header: "公司ID",dataIndex:"COMPANYID",width:'100px',hidden:true},

        { header: "公司",dataIndex:"COMPANYNAME",width:'100px'},

        { header: "分组ID",dataIndex:"GROUPID",width:'100px',hidden:true},

        { header: "分组",dataIndex:"GROUPNAME",width:'100px'},

        { header: "职位角色ID",dataIndex:"ROLEID",width:'100px',hidden:true},

        { header: "职位角色",dataIndex:"ROLENAME",width:'100px'},

        { header: "工作职位",dataIndex:"DEPART",width:'100px'},

        { header: "备用",dataIndex:"IMEI",width:'100px'},

        { header: "手机",dataIndex:"MOB",width:'100px'},

        { header: "注册状态",dataIndex:"REGSTATUS",width:'100px',hidden:true},

        { header: "注册日期",dataIndex:"REGDATE",width:'100px'},

        { header: "电子邮件",dataIndex:"EMAIL",width:'100px'},

        { header: "备用",dataIndex:"UTYPE",width:'100px',hidden:true},

        { header: "创建人",dataIndex:"CREATER",width:'100px'},

        { header: "创建日期",dataIndex:"CREATEDATE",width:'100px'},

        { header: "性别",dataIndex:"SEX",width:'100px'},

        { header: "行政代码",dataIndex:"QU",width:'100px'},

        { header: "公司代码",dataIndex:"COMPANYCODE",width:'100px'}

     ]);


   var store = new Ext.data.Store({

       reader : new Ext.data.ArrayReader({},[

       	{name:'ID'},

       	{name:'USERID'},

       	{name:'USERNAME'},

       	{name:'PASSWORD'},

       	{name:'COMPANYID'},

       	{name:'COMPANYNAME'},

       	{name:'GROUPID'},

       	{name:'GROUPNAME'},

       	{name:'ROLEID'},

       	{name:'ROLENAME'},

       	{name:'DEPART'},

       	{name:'IMEI'},

       	{name:'MOB'},

       	{name:'REGSTATUS'},

       	{name:'REGDATE'},