[C# Connect U14] Transient-Element not working for Parametric Elements

I used the COM Functions CreateTransientElementContainer1(null, MsdTransientFlags.Overlay, MsdViewMask.AllViews, MsdDrawingMode.Hilite); and AppendCopyOfElement(element); but this doesn't work for Parametric Elements. I tested it with Parametric Volumes and Parametric Cells. I didn't tested every Element Type but non Parametric Elements do work.
Is there an easy fix to this or do I need to use a different function now?