I built this cluster of registers with this mod, but apparently when I enable the selected register for releasing the signal to the data bus (white bundled), the signal seems to travel only for a while and not reach the exit of the cluster.

For some reason the signal can travel all the route and get in the register, but not travel out.

Edit:
I am using Feed The Beast modpack Inventions on Minecraft 1.7.10

Is it exceeding 255 blocks?