MPU-9150 EVB no output in python

Hi all
i installed the driver for the mpu-9150evb and i manage to get raw data from the Universal DataLogger

but when i try to run the cube demo in python i dont get any output... the pygame screen is blank... and i dont get anything logged even tho i write down
invg,inva and press ctrl+s

there is no cube spinning in the window and i dont get any errors...

anyone experienced that? or know what i can do to make it work?

thanks