Simple Credit Limit Check

Hi Guru's

Iam facing one problem in simple credit limit check

Iam using simple credit limit check in sales document type as "C-Run Simple Credit Limit check and delivery block"

Execution is working fine but when I released from VKM3 or VKM5 it is not releasing, the same delivery block is appearing and it is not allowing me to create delivery.

For this Every time iam going and releasing in sales order change mode

Could u plz light on this

Thanks and Regards

Srinivas Kapuganti