LP-MSPM0G3507: Jlink : no cortex-m sw device found

Hi TI,

I am using the launchPad ,the MCU is MSPM0G3507(Rev B).

I found i can not use Jlink to debug this board.

If I use an early version, which is Rev A. The Connection is successful.

So why? Is there any difference? How to deal with this problem!

Thanks.