GSTEXT Header/Item Level Text Notes Displaying

Hi Guys,

   My requirement is need to display Header/Item Level Text Notes (GSTEXT/Main Window) AB in a OV page (based on selection Item Notes need to be updated). I have created new OV page and created two component usage for Header and Item and with using of custom controller(for Header using std. CuCo for Item created new ZCuCo) i am binding (TEXT and ATTR) context nodes of GSTEXT. Problem is Item level notes are not refreshing data based on selection.

Thanks & Regards,

Nitish