Billing date for Rebate CMs

Hi,

We would like to set the billing date of CMs from rebate settlement to be set as 'current date' instead of the valid-to date of the agreement.

We already updated user exit : RV60AFZC and put the code:

IF sy-tcode EQ 'RBT_ENH_VB7'.

vbrk-fkdat = sy-datum.

But the billing date is still not getting updated..