RobotStudio event

Debuging C# program on TPU by Visual Studio 2008

Hi all.
I want to develop program-"custom screens" in Visual Studio 2008(last possible) and execute and DEBUG it on TPU(IRC5).
Whereas I have restricted access to the robot, I connected my spare TPU to my computer (power suppy(pin1,2), ethernet directly from TPU(cross cable).
After starting, TPU remain in state "Connecting to the robot controller", but doesn't continue...  :-(
I expect Robot studio running on my computer will simulate the real controler, looks not.  :-(
Does anyome know how to do it workable?