Changing status of Task created by system in Notification.

I am facing a problem while changing status of "Task" in Notification to "Complete". Actually I want that if system is cretating a Task automatically in Notification, this Task should have status "Complete" instead of release.

For this to happen I did some settings but after that system is giving me arror as shown in below.

If any body has faced simmilar situation, pl. give some clue.

Object does not exist (status management)

Message no. IM258

Diagnosis

This refers to an error in central status management.

Task status

The central status management connection at task level will only be supported from Release 3.0.

For this reason, no task status is available for statuses created before changing to Release 3.0, and status change is therefore also not possible.

Procedure

In the case of task statuses of notifications in releases prior to 3.0:

When you save a notification you can create a status for the tasks.

In the case of notification or task statuses for notifications from Release 3.0:

Please refer to your system administrator.