SharePoint 2010 JS grid Checkbox behaviour

Hi

I am using SharePoint JS Grid to load my data from database. Each record of grid includes a checkbox column. The grid renders well but following scenarios fails:

In grid select a checkbox to select a particular record, scroll down in the grid untill the selected record goes then scroll up again, the selected record does not persist the checkbox checked state.

I am using following code to initialize the grid

 this.Init = function (jsGridControl, initialData, props) {

            // Assign it to global variable
            _jsGridControl = jsGridControl;
            _props = props;

            // Delegate to handle sort
            jsGridControl.SetDelegate(SP.JsGrid.DelegateType.Sort, HandleSort);
            var dataSource = new SP.JsGrid.StaticDataSource(initialData);

            // grid data source
            _tableCache = dataSource.tableCache;
            var jsGridParams = dataSource.InitJsGridParams();
            jsGridParams.styleManager.RegisterCellStyle('TextRightAlign', SP.JsGrid.Style.CreateStyle(SP.JsGrid.Style.Type.Cell, { textAlign: 'right' }));
            jsGridControl.Init(jsGridParams);
        }

Please help if anyone has the solution.