Customizing Graph labels in Crystal Reports 10

Hi all,

I am using Crystal Reports 10 with VB.NET 2003. I got stuck in a issue with Graph(Pie Chart). I have created Graph, everything is fine, except labels. It generates Labels automatically from Dataset, which are obviously weird as far as user end is concerned. For example, it is rendering a label for a field like this :

Sum of @fieldname(formula)

or

Datatable.fieldname.

I want it to show customized label for each field which are easy to understand.

Is it possible? If so then anyone can please guide me for this.

Thanks