Hacking Injecting NTRBoot Problem?

[Pokem]

I've been having issues trying to flash my R4.

That happens.
I chose the correct option (or at least I think I did) and I just get a black bottom screen, and it's stuck on that screen until I press the home button to go back to the home menu.
Does anyone know what to do?
Please help.
N3DS version is 11.8

 

[Pokem]

Does no one know a working solution? :l
Does this mean my flashcart is not compatible?

 

[Pokem]

I was finally able to flash my cart!
Thanks to the help of @thisisallowed.
This is the version of ntrboot flash I used that worked for MY specific cart.
R4 SDHC Dual Core 2016, r4isdhc.com.cn
https://github.com/trbocode/trbocode.github.io/blob/master/ntrboot_flasher_nds.nds