Feature-Tutorials--Shadows BUG!

I join this thread for not making another, when i run the shadow demo panda tell me :

And when i quit the app he said me :

A screenshot of what looks the shadow demo on my computer.

I don’t know if it’s the good render, but when i modify the bias value and the light source nothing appended.
Can somebody post a good render of the sample ?

if it can help, my graphic card is :