hi guys ,
i have problem , i have checkbox colum in my grid and i enable Drag Drop rows in grid.
the problem is , when i use enableDragDrop in gride ,, some problems come in grid like
i could not check more than one ckeckbox ,and i cant uncheck the check box ,,
the script is

Code:
var xg = Ext.grid;
    var sm = new Ext.grid.CheckboxSelectionModel();
    var wlCm = new Ext.grid.ColumnModel([
			sm ,
    	    {header:"Symbol", dataIndex:"symbol"},
    	    {header:"Description", dataIndex:"description",width:220},
    	    {header:"M", dataIndex:"m_desc", width:140},
    	    {
           		header: "Show In",
           		dataIndex: 'showIn',
           		width: 110,
           		editor: new Ext.form.ComboBox({
	            typeAhead: true,
	            triggerAction: 'all',
	            transform: 'light',
	            lazyRender: true,
				stripeRows : true,
	            listClass: 'x-combo-list-small'  })
	        },
			 

 			{header:"ticker_id", dataIndex:"ticker_id",hidden:'true'}
			
    ]);
	
	wlCm.defaultSortable = true;

	var saveBtn  = new Ext.Toolbar.Button({		
		text :'Save',		
		handler :saveDate		
	});

	var delAllBtn  = new Ext.Toolbar.Button({		
		text :'Delete All',
		handler :delAllTick		
	});
	
	var delSelectedBtn  = new Ext.Toolbar.Button({
		text :'Delete Selected',
		handler :delTicks
	});	
	
	var saveSorting  = new Ext.Toolbar.Button({
		text :'Save Sorted Rows',
		handler :saveSortRows
	});	
		
		
	var wlGrid = new Ext.grid.EditorGridPanel({
		id:'testtesttest',
        enableColumnHide:true,
        viewCofig:{
            fitView:true
        },
        enableHdMenu:true,
        trackMouseOver:true,
		ds: wlDs,
        cm: wlCm,
		sm: sm, 			
		plugins:checkColumn,
		sortInfo:{field: 'symbol'},
		title:'My Tickers',
		stripeRows: true,
		height:220,
        width:610,
		frame:true,
		autoScroll: true,
		ddGroup: 'GridDD',
        ddText: 'Drag to change Sorting', 
        title: 'Order Triggers',
        enableColLock:false,
	    enableDragDrop: true,
        clicksToEdit:1,
		bbar:[saveBtn,'-',delAllBtn,'-',delSelectedBtn,'-',saveSorting],
	selModel: new Ext.grid.RowSelectionModel({singleSelect:false})
    });
    
	wlGrid.on('render', ordersDt);
    function ordersDt(gr){
    var ddrow = new Ext.dd.DropTarget(gr.getView().mainBody, {
	    ddGroup : 'GridDD',
	    copy:false,
	    notifyDrop : function(dd, e, data){
	        var sm1=gr.getSelectionModel();
	        var rows=sm1.getSelections();
           
           ds = gr.getStore();
           var cindex=dd.getDragData(e).rowIndex;
	           if (typeof cindex != "undefined") {
	                for (i = 0; i < rows.length; i++) {
	                    rowData=ds.getById(rows[i].id);
	                    
                        if (!this.copy) {
	                        ds.remove(wlDs.getById(rows[i].id));
	                        ds.insert(cindex,rowData);
	                    }
	                }
	                sm1.selectRecords(rows);
	            }  
	        }
	});
 }

i hope u got me ..thanks
my regards