Editing in Hierarchical ALV list

Hi Experts

I have created a hierarchical ALV list, in which I want to give input to some fields. In the fieldcatalog I enabled the edit option as 'X'. But I am unable to edit in the ALV. It is not editable. Is there any other way to do that.

I am unable to optimize the column width also. I wrote colwidth_optimize in layout. It doesn't work.

Thanks and regards,

Venkat