Alert on New Userfierld
 

Hi!
I got vbulletin 3.8 and I added a new userfield:

Name: Ubicacion
Type:Single-Selection Menu
Attributes: Required* Editable* Searchable* Members List

The thing is that when a user logs in to the forum the forum doesnt force the user to fill it.
I disabled hooks and same happens.
How can I foce a user to fill that field?
Tnx!