Screen number Change in FB02 & FB09 BDC Recording

Hi Experts,

I am want to update item text in T-code FB02 or may be in FB09 so for this purpose I have recorded the transaction through SHDB but the screen where i need to change the item text changes every time in recording, I thought it may be happening due to change in Account type (BSEG-KOART) field but that was not the case. I have even tried FM FI_DOCUMENT_CHANGE to do the same but through this FM the item text is changed for few document only not for all.

{code}

CALL FUNCTION 'FI_DOCUMENT_CHANGE'

   EXPORTING

     i_buzei              = indx              " BUEZEI " Item number

     i_bukrs              = wa_fb02-bukrs

     i_belnr              = wa_fb02-belnr

     i_gjahr              = wa_fb02-gjahr

   TABLES

     t_accchg             = t_accchg          " Feild name to be changed, Old & New Value

   EXCEPTIONS

     no_reference         = 1

     no_document          = 2

     many_documents       = 3

     wrong_input          = 4

     overwrite_creditcard = 5

     OTHERS               = 6.
{code}