noob here needs help

Im a newbie here with panda3d.I have followed the manual correctly on how to start up and showing the grey screen.But when i try to update the code further to show the model and graphics it just shows me the same grey screen , I have saved the updated script but it throws out the same grey screen.What am i doing wrong?.I use pype for my scripting.

Hello, can you post the code?

and, more intresting, any errors/warnings you get on the terminal/console.

Did you move the camera around to see where the objects you rendered are? I.e. hold dawn left mouse click to pan and hold down right click and move forward/back to zoom out/in.