64MP camera with rpi4 is not able to software motorized zoon

Raspberry Pi Cameras ptz-pan-tilt-zoom-camera-on-raspberry-pi
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I have enable I2C from sudo raspi-config.
config.txt file edited as per tutorial. added dtparam=i2c_vc=on
I am running code,
But, I am not able to make it zoom.
what is missing?