adding lines to segment of Idoc in User Exit ZXEDFU02

Hi!

do I need to maintain Idoc in WE30 if I need to add some lines to one segment in User Exit ZXEDFU02?

Here is my sample code placed in ZXEDFU02 for adding a line, but it is not making an effect:

WHEN 'E1EDP01'.

CLEAR E1EDP26.

E1EDP26-QUALF = '003'.

E1EDP26-BETRG = 777.

or maybe it depends on Idoc that I use in We19?

For example, if Idoc that I use in WE19 for testing my User Exit does not has qualifier 003 in segment E1EDP26... could it be a reason?

Will reward,

Mindaugas.