Unable to replicate DNS zones from tree domain to forest domain

I created a test AD environment that consists of a forest and a tree domains in, of course, transitive trust relationship.

The two domains are acme.local (forest) and provence.local (tree). DNS zones created in provence.local are unable to replicate to acme.local, but replication from acme.local to provence.local is OK.

Any insight?

Thanks,

Mike