Unreal scene for LED wall no images from F1-F4 out pins

Studio Operators Content Creation Unreal



I've been messing around with LED wall based setup. The problem is when i finished the UE test scene, which i've followed the wiki tutorial about LED wall, and drag it to Aximmetry, the OUT pin has image, but nothing come out from F1-F4 Out pins, I have no idea why):