Export memory statement not working between two methods

Question

hello all
i m implementing one BADI MB_MIGO_BADI .this BADI is having 2 methods 1)LINE_MODIFY and 2)PBO_DETAIL.
the followng is the code in LINE_MODIFY methd
DATA : c_flag TYPE c .
  TYPES:BEGIN OF tp_ecppa,
        prvsy     TYPE /sapsll/prvsy_spi,
        ecpid     TYPE /sapsll/ecpid_spi,
  END OF tp_ecppa.
  DATA:wl_ecppa TYPE tp_ecppa.
  IF cs_goitem-matnr IS NOT  INITIAL.
   SELECT  prvsy ecpid UP TO 1 ROWS FROM /sapsll/ecppa INTO wl_ecppa WHERE prvsy = cs_goitem-matnr.
   ENDSELECT.
   IF wl_ecppa-ecpid EQ 'DE3203CWIP'.
      c_flag = 'X'.
   ENDIF.
  ENDIF.
SET PARAMETER ID 'PMEM' FIELD c_flag.
  export c_flag from c_flag  to memory id 'mem1'.
the following is the code in PBO_DETAIL method
METHOD IF_EX_MB_MIGO_BADI~PBO_DETAIL.
  IF SY-UNAME = 'E494049' or sy-uname = 'E491754'.
    DATA:C_FLG TYPE C .
    CLEAR C_FLG.
    if gf_class_id eq i_class_id.
GET PARAMETER ID 'PMEM' FIELD c_FLG.
   Import c_flg to c_flg from memory id 'mem1'.
IF C_FLG = 'X'.
E_CPROG = 'ZP1_SCREEN'.
E_DYNNR = '0001'.
E_HEADING = 'GTS'.
ENDIF.
endif.
endif.
free memory id 'PMEM'.
ENDMETHOD.                    "IF_EX_MB_MIGO_BADI~PBO_DETAIL
but the new tab is not displayed in MIGO . so i think there is some mistake in  export memory statement .
so could you please check if i have used export/import statements correctly.

Answer 1

If problem is rectified, Please mark as answered.
Sujay