Unable to call POXPOEPO form with quary data

Hi All ,

I am using the following API to call PO standard form , Form is getting open but query data is not getting up.

FUNCTION_NAME=> 'PO_POXPOEPO',
      OPEN_FLAG=>'Y',
   SESSION_FLAG=>'Y',
   OTHER_PARAMS=> 'PO_HEADER_ID ='||name_in('PO_HISTORY.PO_HEADER_ID')||'ACCESS_LEVEL_CODE='||'''MODIFY'''||'POXPOEPO_CALLING_FORM='||'''OTHER_FORM''');

Please help me ...

Thanks,

Kiran