Drag and drop and Remote Desktop Connection


I have developped a Silverlight application using Goxam librarie.
In the application, i'm using drag and drop to create node in the diagram from a palette.
When i use it over classic http everything work fine, i can drag and drop without any problem.
When i use the application over a Microsoft Remote Desktop Connection (RDP protocol), i'm experiencing some problem with drag and drop. Sometimes, it works, sometimes it's not working.
Have you ever experience this problem in the past ?
Can i do something to make it work over a remote protocol connection ?

I haven’t experienced that problem. But maybe I just have a different set-up.