While Creating Function module Error is coming.

hi.

i need a small information.

I need to fetch some data from the mara tables

Fetching means two fields or column i need fetch from the data base.

so, first i gone to se11 and i create a structure..

            i enter that two fields and i activated it.

          some fields like mara or works (Exact field i have not remember it but imagine two fields.......)

now i open se37 and create one function module.,

  under      import tab  i enter parameter  ok

now i want to create internal table

  under changes i entered like

    it_internaltab     like               zmarc  -> this is se11 structure name i given

  if i save or move the mouse.

  it is showing that.

  table parameters are obsolete

   i even tried like

    it_internaltab     type             zmarc  -> this is se11 structure name i given

   but it is not working May i know how can i solve this one