Issue in VOFM routine

Hello Experts,

I am getting issue with VOFM routine. I have created one Condition Value routine and I have to populate amount and value of one condition Type.

For amount, I am populating value in XKOMV-KBETR and For value , variable xkwert is being used.

If I am passing 500 to xkwert , then its getting displayed in my sales order correctly but amount ( XKOMV-KBETR) is coming as blank.

when I debugged , then i came to know that standard is overwriting the value of XKOMV-KBETR.

Please help me.

Thanks & Regards,

Ishani