How can I use the 'Debugger' in Qt for mcu?

[mingyoo]

I'm using a NXP IMXRT1050-EVKB, and flash downloading on board is successfully completed.
I added a breakpoint in debugging mode like this,

but it doesn't work. Actually there isn't any response passing the breakpoint.
Is there any missing before I start debugging?
And here is my configuration below..