Silverlight Context Menu

Can we use silverlight toolkit context menu on diagram control from goxam?
I tried the same but was getting error.Also tried the context menu from code behind,it is working but
it is getting display on left side.I need to show the same on newly added shape in diagram.Is this possible?

The GoSilverlightBasic sample application demonstrates context menus on Nodes, on Links, and in the Diagram background.