extjs treegrid 问题

[miss_lynne]

使用例子没有问题，但是修改列以后，出现参数错误

JS页面

var tree = new Ext.ux.tree.TreeGrid({
			title: '资源管理',
	        enableDD: true,
	        columns:[{
	            header: 'ID',
	            dataIndex: 'ID'
	        },{
	            header: 'Pid',
	            dataIndex: 'Pid'
	        },{
	            header: 'resName',
	            dataIndex: 'resName'
	        },{
	            header: 'resDesc',
	            dataIndex: 'resDesc'
	        },{
	            header: 'resType',
	            dataIndex: 'resType'
	        },{
	            header: 'resUrl',
	            dataIndex: 'resUrl'
	        },{
	            header: 'resOrder',
	            dataIndex: 'resOrder'
	        }],
	        dataUrl: 'treegrid-data.json'
	    });

json格式

[{
	ID : '1f127c9088a34b3bb98f80157a30f3c3',
	pid : '0',
	resName : 'PO',
	resDesc : '个人办公',
	resType : '0',
	resUrl : '',
	resOrder : '1000',
	children:[{
		ID:'4028d8eb335cac5501335cb8b7410001',
		Pid:'1f127c9088a34b3bb98f80157a30f3c3',
		resName:'TodoTaskView',
		resDesc:'待办任务',
		resType:'0',
		resUrl:'/module/po/TodoTaskView.js',
		resOrder:'1001',
		leaf:true
	}]
},{
	ID : '4028d8ea31031e1401310322dfe40002',
	pid : '0',
	resName : 'SSO',
	resDesc : '认证授权',
	resType : '0',
	resUrl : '',
	resOrder : '80000',
	children:[{
		ID:'4028d8ea31031e1401310324a61e0003',
		Pid:'4028d8ea31031e1401310322dfe40002',
		resName:'SsoUserView',
		resDesc:'账号管理',
		resType:'0',
		resUrl:'/module/sso/SsoUserView.js',
		resOrder:'80001',
		leaf:true
	},{
		ID:'4028d8f733b017560133b02fb0230003',
		Pid:'4028d8ea31031e1401310322dfe40002',
		resName:'SsoRoleView',
		resDesc:'角色管理',
		resType:'0',
		resUrl:'/module/sso/SsoRoleView.js',
		resOrder:'80002',
		leaf:true
	},{
		ID:'4028d8f733b017560133b03ab28f0004',
		Pid:'4028d8ea31031e1401310322dfe40002',
		resName:'SsoResourceView',
		resDesc:'资源管理',
		resType:'0',
		resUrl:'/module/sso/SsoResourceView.js',
		resOrder:'80003',
		leaf:true
	},{
		ID:'4028d8ec32f2416c0132f622fc430004',
		Pid:'4028d8ea31031e1401310322dfe40002',
		resName:'SsoActionView',
		resDesc:'操作管理',
		resType:'0',
		resUrl:'/module/sso/SsoActionView.js',
		resOrder:'80004',
		leaf:true
	}]
},{
	ID : '4028d8ea31031e140131032f86e80006',
	pid : '0',
	resName : 'SYSTEM',
	resDesc : '系统管理',
	resType : '0',
	resUrl : '',
	resOrder : '90000',
	children:[{
		ID:'c62c812b3fd64990b2f19b33a645994e',
		Pid:'4028d8ea31031e140131032f86e80006',
		resName:'SysLogView',
		resDesc:'系统日志',
		resType:'0',
		resUrl:'/module/system/SysLogView.js',
		resOrder:'90001',
		leaf:true
	},{
		ID:'f29bb1868c734ba9ba2d4424e3cb2caf',
		Pid:'4028d8ea31031e140131032f86e80006',
		resName:'SysPlanView',
		resDesc:'系统计划',
		resType:'0',
		resUrl:'/module/system/SysPlanView.js',
		resOrder:'90002',
		leaf:true
	},{
		ID:'02fed07668ba48139c6a27b02ffc336e',
		Pid:'4028d8ea31031e140131032f86e80006',
		resName:'SysParamView',
		resDesc:'系统参数',
		resType:'0',
		resUrl:'/module/system/SysParamView.js',
		resOrder:'90003',
		leaf:true
	},{
		ID:'39ca0f38eb224fc7a10414873fce948e',
		Pid:'4028d8ea31031e140131032f86e80006',
		resName:'JBPM',
		resDesc:'工作流引擎',
		resType:'0',
		resUrl:'',
		resOrder:'91000,
		children:[{
			ID:'81e31b13051f4b79bedb2f058f37cdf9',
			Pid:'39ca0f38eb224fc7a10414873fce948e',
			resName:'JbpmTempView',
			resDesc:'流程模板',
			resType:'0',
			resUrl:'/module/jbpm/JbpmTempView.js',
			resOrder:'91001',
			leaf:true
		},{
			ID:'eec012aaa4bc4c829ccf196be1213cc5',
			Pid:'39ca0f38eb224fc7a10414873fce948e',
			resName:'JbpmInstView',
			resDesc:'流程实例',
			resType:'0',
			resUrl:'/module/jbpm/JbpmInstView.js',
			resOrder:'91002',
			leaf:true
		},{
			ID:'c30af3f796294d639743b1ef360587f6',
			Pid:'39ca0f38eb224fc7a10414873fce948e',
			resName:'JbpmHistView',
			resDesc:'流程历史',
			resType:'0',
			resUrl:'/module/jbpm/JbpmHistView.js',
			resOrder:'91003',
			leaf:true
		}]
	}]
}]