BADI le_shp_tab_cust_item not saving data to lips

Hi,

Im using BADI le_shp_tab_cust_item to save couple of fields to delivery. I have added custom screen and made all settings as well. I have also added custom fields to CS_LIPS structure of transfer_data_to_subscreen method. everything is fine except fields are not being saved in LIPS table. I have gone through other blogs as well but couldn't find solution. could anybody please advise on this.

Regards