how do I get the MAKTX, BANFN data by using the modify statement ?

Report program1.

TYPES : begin of ty_sales,

VBELN type vbak-vbeln,

KUNNR type vbak-kunnr,

BSTNK type vbak-bstnk,

ERDAT type vbak-erdat,

WERKS type vbap-werks,

MATNR type VBAP-matnr,

fixmg type vbap-fixmg,

BANFN type ekpo-banfn,

MAKTX type makt-maktx,

END OF ty_sales.

data : itab type table of ty_sales,
wa type ty_sales.

PARAMETERS : p_VBELN type vbak-vbeln,

KUNNR type vbak-kunnr,

BSTNK type vbak-bstnk,

ERDAT type vbak-erdat,

WERKS type vbap-werks,

p_MATNR type mara-matnr.


Select vbak~VBELN vbak~KUNNR vbak~BSTNK vbak~ERDAT vbap~WERKS VBAP~MATNR vbap~fixmg
from vbak inner join vbap
on vbak~vbeln = vbap~vbeln
into table itab
where vbap~vbeln = p_vbeln.


if sy-subrc eq 0.

loop at itab into wa.

AT new vbeln.
write : 'sales ordre number :' COLOR 1,wa-vbeln.
ENDAT.

at new bstnk.
write: / 'customer purchase order number :' COLOR 2,wa-bstnk.
endat.

skip 1.

write : / 'material number :' color 3,wa-matnr.

write : / 'purchase order item delivery date :' color 4,wa-fixmg.

write: / 'material description :' COLOR 5,wa-maktx.
write: / 'purchase order requestion :' COLOR 6,wa-banfn.

uline.

ENDLOOP.

endif.