not restoring layout as saved

I have downloaded a trial and have noticed that when I use

 IsolatedStorageProvider isoProvider = new IsolatedStorageProvider();

isoProvider.SaveToStorage();

and then the next session do a Load

IsolatedStorageProvider iso = new IsolatedStorageProvider();
iso.LoadFromStorage();   

 the layout is nicely restored. However: some of the grid columns are dropdown lists and databound. When I have done the LoadFromStorage the databinding of the viewmodel is gone, and the list is empty. Also recreating the viewmodel does not work.