Problem regarding Diagrams 2013R2

Wisa123

Hi Community,

I am facing a minor problem using the GenericCharts in 2013R2.

My Goal is to Design a Diagram showing the turnover for all Customers, seperated by Posting Month.
As Source I have two options: Table and Query.

Using the Query, i already got the diagram working right, exctracting the Data GroupBy(MethodType: Date, Method: Month and MethodType: Date, Method Year).
The only problem im facing is, how can i combine Month+Year to show them together in the Diagrams scaling?

You can see the Problem in the little screen i attached. It only shows the Month there, how can i get it to print 01/2014, 02/2014,....

Regards,
Wisa