I am running CtrBootManager9 V.5 with Screen-int A9LH installed the current version of Luma (downloaded from here to make payload changing easier) works just fine.
What does your a9lh.cfg have it? Please post that so we can see if it's configured properly.
[general];
timeout=0;
recovery=4;
default=0;
[theme];
bgTop1=FFFFFF;
bgTop2=FFFFFF;
bgBottom=FFFFFF;
highlight=53BBF3;
borders=000000;
font1=000000;
font2=FFFFFF;
bgImgTop=/A9LH_FILES/bgTop.bin;
bgImgBot=/A9LH_FILES/bgBot.bin;
[entry];
title=Decrypt9WIP;
path=/A9LH_FILES/Decrypt9WIP.bin;
offset=0;
key=-1;
[entry];
title=Emunand9;
path=/A9LH_FILES/Emunand9.bin;
offset=0;
key=-1;
[entry];
title=Uncart;
path=/A9LH_FILES/Uncart.bin;
offset=0;
key=-1;
[entry];
title=SafeA9LHInstaller;
path=/A9LH_FILES/SafeA9LHInstaller.bin;
offset=0;
key=6;
my conf