g/l account no in g/l entry table must be flow field error

Hi guys i have proplem in report i make report consist from three data item

g/laccount

 g/lentry

 g/l entry2

like above i put two text boxes in FromNo,ToNo in Request form to filter document no Meaning as example i will write from document no 2 to 122 but i face proplem third data item g/lentry2 i want to group g/laccount no and credit amount i dont know how to make grouping in third data item by g/laccount no . how i make setrange in third data item to accept range of document no between these two numberes.

 can any one help me

 thanks