STM32L476VG discovery board Jtag communication with IAR

Hi, I have a STM32L476VG discovery board and I want to program it with jtag communication and PE micro multilink universal programmer and IAR IDE.

I have installed a firmware of ARM in PE programmer and I have connected NJRST, JTDI, JTMS, JTCK, JTDO, NRST of programmer to the board then I Chose PE as debugging driver in IAR IDE. but can not communicate with MCU.

I have checked the wires connectivity but problem is not solved.

it says: Can't Communicate with target processor! Please check your connections between the cable and the target and make sure the target has power.

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