DataUpdate not showing

When I follow the steps to assign batch jobs to the correct batch groups:

1. Open System Administration > Setup > Workflow > Workflow infrastructure configuration.
2. The Workflow infrastructure configuration wizard is displayed.
3. Click Next.
4. Configure the workflow messaging batch job, under Batch group select DataUpdate.

==> BUT I CANNOT FIND DATAUPDATE, THERE IS NOTHING TO CHOOSE, GREY OUT.

THANK YOU FOR YOUR SUPPORT!