Activity type in Order operations

Hi

Hi

While I am creating maintenance orders, in operations tab Activitytype was not getting displayed (throgh F4)aginst the mainteannce Work center.

I have checked in Work center master data there also this activty type was not assiged, and I am unable to assign the activity type.

While I try to assign activity type in operations tab in Order the error was displaying like this: No activity types assigned to cost center XXXXXX, controlling area YYYY on 28.08.2008 message error is CR091

Activity type has been created through Costing consultant.

Can any body breif me on this.

By this I can capture the manhours cost in mainteance order.

Regards

Srinvas