Trying to set Minimum Payment/Refund to $1

We are trying to set the minimum amount of Payment/Refund to $1, by default it is $2. Steps followed.

Specifying the Minimum Payment to Collect : -

1.     Open the billing utility configuration file (BRM_Home/apps/pin_billd/pin.conf) in a text editor.

2.     Change the value of the minimum entry.

          - pin_billd minimum 1.00

Specifying the Minimum Amount to Refund: -

1.     Open the CM configuration file (BRM_Home/sys/cm/pin.conf) in a text editor.

2.     Change the value of the minimum_refund entry. To process refund items only for amounts greater than 1

          - fm_pymt_pol minimum 1.00

After changing these parameters in respective config files and restarted cm. But,