Your definitions look fine. There was a problem with our RadPivotFieldList, but we have found it and fixed it. The fixed version will be included in this week internal build which should be available for download later today or tomorrow. I would suggest you to use it instead of the official version as we have fixed several other problems in it.
If you want to use our official release, than you can set the DataProvider of the two controls in the code behind.
In your XAML:
And in the code behind:
LocalDataSourceProvider dataProvider = (
dataProvider.ItemsSource = App.CurrentSeance.ListData;
.Pivot.DataProvider = dataProvider;
.FieldList.DataProvider = dataProvider;
Hopefully this helps.
the Telerik team