Drilldown sorting

[TomBond77]

Hi experts

I have created a drilldown dimension: Cost Center -> Month.

There is a descending sorting order on a measure.  This works fine with cost center. Selecting a cost center I would like to resort by months (ascending) and not by the measure: Jan, Feb, Mar, Apr, May, ....

How can I do this?

Many thanks for your help.

Tom