BADI ME_GUI_PO_CUST not populating custom fields

Hi!

I've created my custom fields in the Line item level for ME21n transaction. The custom fields are in the include structure CL_EKPODB for EKPO. I'm unable to populate my custom fields. Help needed.

My screen fields are named EKPO-ZZSTREET ,EKPO-ZZCITY etc.

Thanks

Shubha!