FCP X A/V Output problem

I have problem disabling FCP X A/V Output
I have FCP X 10.0.9 with AJA KONA LHi and Hardware Driver v10.4.7
I am trying to uncheck FCP X A/V Output to change in AJA Control Panel the frame buffer but it docent uncheck. I have delete preference, create a new event, but still no luck.
It is a pain that I have to close FCP X to change the frame buffer in AJA and then relaunch FCP X.

So apparently I am the only one with this problem.

rickytin wrote: It is a pain that I have to close FCP X to change the frame buffer in AJA and then relaunch FCP X.

That is how it works with both AJA and Blackmagic

Thanks for the replay Anickt and no, I have been working with FCP X and AJA since it was introduce in FCP X 10.0.3 and I have always have the option to uncheck the A/V Output in FCP X and go to AJA Control Panel and select my frame buffer and then check A/V Output in FCP X and now it docent let me uncheck A/V Output in FCP X so to change frame buffer I have to quit FCP X and change frame buffer in AJA Control Panel and then launch FCP X.

OK - it's been a while since I used the AJA product. I'm using Blackmagic now and it requires a re-start and I remembered AJA being the same. Learn something new every day.