Thanks! It's good to know that RD doesn't allow me to do this. I haven't got any experience with remote assistance. though I solved the problem with Real VNC. Great, little, tool.
On the Microsoft website I found a page: "Get started using Remote Desktop with Windows XP Professional" Getting Started with Remote Desktop It shows an example of how to setup a remote desktop connection an it says: Is there a way to configure the applications so that the Host desktop CAN watch what is done? Learning eager! Search strings: RD RDC mstsc