Accessing the stm32F103 controller

Hello all

I am trying to access the stm32F103 in the base board (FMUv5X) through the SWB using the ST-LINK/V2, I made the necessary connections (in the IO DEBUG connector I mapped SWDIO-TMS, GND-GND, SWCLK-TCLK, and the board was powered from and external power source) then I built a simple code (LED blinking).
Now the problem is that I could not access the controller and it seems that the ST-LINK can not find the target!!

so, where is the problem??