Avoid follow-up

Hi, experts

I have created a follow up task for sales document.

Im traying to avoid the follow-up document if sales document have a status CANCELLED. The status was customizing into Status Management-->Define Status Profile for User Status. The status profile contain staus CAN (CANCELLED) and User Status Triggers Business Transaction CANCEL with influence allowed. This status profiel was assigned to Sales Document. However while sales document is checked with status CANCELLED, this enable to create follow-up document, but a I don't like this.

I hope someone can help me.

Regards.

THX in advance.