When placing the build guide in the world, it doesn't show the guide blocks for none of the builds,
I tried placing it in a new generated world, but it doesn't change, the version I have installed is 1.4.3-snapshot-626, I am writing here because I don't know how to code java and mods in general, I hope that someone can help me, thank

So many times

This is generally good place for reporting potential bugs.

But your question was already asked enough times to be added to FAQ. Look under "Why doesn't building guide show any markers?".