Data not change error in CJ20N.

Hi,

In CJ20N I have added my custom screen in one of the standard tab at project definition level. When i save the data, though it gets updated in standard table DRAD but still i got error message as "Data not changed".

I have updated standard table in PAI event of screen as at BADI , PROJECTDEF_UPDATE i am not getting values for table DRAD.

Please suggest me what should i do?

Thanks.