ext js 缩动栏不起作用

Question

                       {
                        contentEl:'center3',
                        title: '参数设置',
                        autoScroll:true,
                        split:true,
                        width: 200,
                        minSize: 175,
                        maxSize: 400,
                        collapsible: true,
                        margins:'0 0 0 5',
                        layout:'accordion',
                        layoutConfig:{
                            animate:true
                        },
                        items: [
                            {title:'输入参数',
                                border:false,
                                iconCls:'nav',
                                layout:"form",
                                autoScroll:true,
                                frame:true,
                                items:[
                                    new Ext.grid.GridPanel({
                      contentEl:"datagrid1",
                      columns: [
                               {header: "名称", width: 310, sortable: true},
                               {header: "数据源", width: 310, sortable: true},
                               {header: "描述", width: 310, sortable: true}
                               ],
                       stripeRows: true,
                       height:350,
                       border: false,
                       width:600,
                        tbar:[
                                {pressed:true,text:"添加"},
                                {pressed:true,text:"编辑"},
                                {pressed:true,text:"删除"}]
                      })
                                ]
                        },
                            {title:'输出参数',
                                border:false,
                                iconCls:'nav',
                                layout:"form",
                                autoScroll:true,
                                frame:true,
                                items:[
                                    new Ext.grid.GridPanel({
                                      contentEl:"datagrid2",
                                      columns: [
                                               {header: "名称", width: 310, sortable: true},
                                               {header: "数据源", width: 310, sortable: true},
                                               {header: "描述", width: 310, sortable: true}
                                               ],
                                       stripeRows: true,
                                       height:350,
                                       border: false,
                                       width:600,
                                        tbar:[
                                                {pressed:true,text:"添加"},
                                                {pressed:true,text:"编辑"},
                                                {pressed:true,text:"删除"}]
                                      })
                                ]},
                            {title:'数值传递',
                                border:false,
                                iconCls:'nav',
                                layout:"form",
                                autoScroll:true,
                                frame:true,
                                items:[
                                    new Ext.grid.GridPanel({
                                      contentEl:"datagrid3",
                                      columns: [
                                               {header: "名称", width: 310, sortable: true},
                                               {header: "数据源", width: 310, sortable: true},
                                               {header: "描述", width: 310, sortable: true}
                                               ],
                                       stripeRows: true,
                                       height:350,
                                       border: false,
                                       width:600,
                                        tbar:[
                                                {pressed:true,text:"添加"},
                                                {pressed:true,text:"编辑"},
                                                {pressed:true,text:"删除"}]
                                      })
                                ]},
                            {title:'效验点',
                                border:false,
                                iconCls:'nav',
                                layout:"form",
                                autoScroll:true,
                                frame:true,
                                items:[
                                    new Ext.grid.GridPanel({
                                      contentEl:"datagrid4",
                                      columns: [
                                               {header: "名称", width: 310, sortable: true},
                                               {header: "表达式", width: 310, sortable: true},
                                               {header: "描述", width: 310, sortable: true}
                                               ],
                                       stripeRows: true,
                                       height:350,
                                       border: false,
                                       width:600,
                                        tbar:[
                                                {pressed:true,text:"添加"},
                                                {pressed:true,text:"编辑"},
                                                {pressed:true,text:"删除"}]
                                      })
                                ]}]
                    }这是一个extjs 的可以上下缩动栏  ，我在每个缩动栏里面加了个表，在我不加之前点击第二次缩动栏是可以关闭的，可是加了表格后，只有第一个有效，其他的就不起作用了
这是为什么啊，在线等