Unable to identify checkbox object in flex application

Hi All,

I have a problem in identifying the checkbox object in flex application. I have attached screenshots of the application, object name mapping along with its child objects and its properties. 

I have added the Advanced Datagrid class in the current project properties, Open applications - Flas/Flex.

The grid is a scrollable grid, we need to toggle the checkbox which are currently not visible in the screen.

Please provide a solution

Thanks,

Suresh Pandian