ME23n service report?

In my service item report, i am having a problem

1,first item check the movment type then append it ,

2,then move on to next item it wont check the movement type directly go to first endloop ,

3, then again go to loop esll directly move on to clear_mseg , endloop,

4 , loop esll write netwr, menge .... but value is change in bwart mblnr erfmg dmbtr value is change

5 llop at esln read second item move on to endloop

6,move on to first loop then go end endloop .

IF it_mseg[] IS NOT INITIAL.
LOOP AT it_mseg INTO wa_mseg WHERE ebeln = it_ekpo-ebeln AND ebelp = it_ekpo-ebelp.
flag = 'X'.
sort it_esll1 by packno.
LOOP AT it_esll1 WHERE packno = it_esll-sub_packno.

wa_output-netwr = it_esll1-netwr.
wa_output-menge = it_esll1-menge.
wa_output-meins = it_esll1-meins.
READ TABLE it_t006a WITH KEY msehi = it_esll1-meins.
IF sy-subrc = 0.
wa_output-mseh3 = it_t006a-mseh3.
wa_output-msehl = it_t006a-msehl.
ENDIF.


AT NEW packno. "extrow.

*
CASE wa_mseg-bwart.

WHEN '101'.
wa_output-mblnr = wa_mseg-mblnr.

wa_output-act_menge = wa_mseg-erfmg.

wa_output-act_wert = wa_mseg-dmbtr.
WHEN '102'.
wa_output-mblnr = wa_mseg-mblnr.
wa_output-act_menge = wa_mseg-erfmg * ( -1 ).

wa_output-act_wert = wa_mseg-dmbtr * ( -1 ).
WHEN '122'.
wa_output-mblnr = wa_mseg-mblnr.
wa_output-act_menge = wa_mseg-erfmg * ( -1 ).
wa_output-act_wert = wa_mseg-dmbtr * ( -1 ).
WHEN OTHERS.

ENDCASE.

APPEND wa_output TO it_output.
CLEAR: wa_mseg, WA_output,IT_ESLL1.
ENDAT.
clear:wa_output.
ENDLOOP.
clear: wa_mseg.
ENDLOOP.
clear : wa_output.
ENDIF.