I want to make use of the export command task of powermail. That works, but i need the field marker(custom variables) not the field label as column name. I created a new template file as suggested here

I want to adapt the ExportXsl.html. I tried to change

<vh:String.RemoveQuote><vh:Getter.GetFieldLabelFromUid uid="{fieldUid}" /></vh:String.RemoveQuote>

to

<vh:String.RemoveQuote><vh:Getter.GetFieldMarkerFromUid uid="{fieldUid}" /></vh:String.RemoveQuote>

but this does nothing. What can be done?