ARTK+ and VideoIn trouble

Hello folks,

I been trying to get simple box/teapot aligned to the marker, i suppose this is exactly the help patch has for artk+ but i am not able to see the webcam video on the renderer. At first place videoIn node acts strange, if i create a fresh patch with videoin it doesn’t work until i select the node and press f1 and then it all works. I have similar problem with artk+ and since i cant see the video i cant understnad how it works.

Using V27.1, Please help me to resolve this :)