overwriting text updated by SAVE_TEXT before commit

Hi All ,

I want to update the long text of equipment at save event from code. I am using SAVE_TEXT for this . Its working fine . But in case where user edits long text and then save it then system does not overwrite manually entered text with text from my code. I have checked in debugging an found that

when user enters long text manually and comes back to header screen in tcode IE01/IE02 then system calls a SAVE_TEXT from program LSTXXFTE ( line no 588 ) .

Although my SAVE_TEXT is being called again after the above call still system is not overwriting the long text. Why so . I am using ISNERT = ' ' and SAVE_DIRECT = 'X' in my parameter.