Query as document datasource

Hi, everybody

I created a simple query with CustTable > SalesTable > SalesLine. Relations are set to 'Yes' and all tables have Dynamic property also set to 'Yes'.

I published the query in the Document datasources form, called it from Excel and set a sheet with customer account, name, sales order, item and line amount.

Everything works fine and data is displayed properly. But when I add a Group by on SalesLine.SalesId and add a sum(LineAmount) in SalesLine fields, nothing changes.

I tried recreating and reactivating the record in Document datasources and recreating my Excel document from scratch. No sign of a group by in Excel.

Any information about this issue would be greatly appreciated.

Thank you.