Using Equals will not work for you. Theoretically, you might also be able to use Contains.
The answer to the question @emre is asking can be revealed in Entity Types. It is important to use the correct value for {ENTITY NAME:entityname} and not {ENTITY NAME:entityTypename} …
EDIT: actually, it doesn’t seem to matter in this case - both Customer and Customers work fine.
That said, I can’t understand how that is working properly as you expect it to. The Constraints are basically saying “fire this Rule/Action if Entity Type Name equals Clientes or FCA1”.
excuse me for the delay of responses, is that my city it rains a lot, it looks as if the sky will fall on us, and this causes problems in internet communication.