'F4IF_INT_TABLE_VALUE_REQUEST' is not returning any value when selecting da

Question

*Hello Guys.*
*I hv inserted search help in an field of screen exit in T-code IW21. Its showing value properly when i press f4 but when selecting value its nt returning any value properly....*
*I am pasting code ..please help me out*
*. Process of value Request*
*field <fieldname>  module F4_AGENCY*
*MODULE F4_AGENCY INPUT.*
  *DATA: IT_AGENCY TYPE TABLE OF ZF4_AGENCY WITH HEADER LINE,*
        *it_FIELD_TAB      type table of DFIES WITH HEADER LINE,*
        *IT_DDSHRETVAL TYPE TABLE OF DDSHRETVAL WITH HEADER LINE.*
  *REFRESH : IT_AGENCY[].*
*clear : VIQMEL-ZZAGENCY.*
**SELECT * FROM ZF4_AGENCY INTO TABLE IT_AGENCY.**
  *CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'*
    *EXPORTING*
  DDIC_STRUCTURE           = 'ZF4_AGENCY'**
      *RETFIELD               = 'ZZAGENCY'*
    PVALKEY                 = ' '**
     *DYNPPROG                = sy-cprog  "'SAPLXQQM'*
     *DYNPNR                  = sy-dynnr   "'0101'*
     *DYNPROFIELD             = 'VIQMEL-ZZAGENCY'*
    STEPL                  = sy-stepl**
     *VALUE_ORG               = 'S'*
   *TABLES*
    *VALUE_TAB              = IT_AGENCY[]*
    *FIELD_TAB              = it_FIELD_TAB[]*
    *RETURN_TAB             =  IT_DDSHRETVAL[]*
  DYNPFLD_MAPPING        =**
EXCEPTIONS**
  PARAMETER_ERROR        = 1**
  NO_VALUES_FOUND        = 2**
  OTHERS                 = 3**
  *IF SY-SUBRC <> 0.*
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO**
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.**
  *ENDIF.*
*wating for any reply*

Answer 1

Did you take a look at the help for FM? pass the hardcoded value for DYNPPROG and DYNNR (and see if that works)
DYNPPROG and DYNNR cannot be passed as SY-REPID and SY-DYNNR because they are only analyzed after the function module has been called. Instead, first copy the SY fields to local variables and then pass them to the function module.