NUCLEO-STM32F767ZI no ST-LINK detected problem

I have just purchased STM32 nucleo board F767ZI. I have generated cubeMX project and opened it using Keil uVision. I have used all default settings for projects and connected the board to my PC using USB. I am not able to debug/program the board as the internal st-link is not detected. Can someone give me a hand and advice me what to check and look for to solve this problem?

Picture of my board:
[ATTACH type="full" align="left"...

NUCLEO-STM32F767ZI no ST-LINK detected problem