extentions_overrride_freepbx.conf is not working

Hi, I´m using FreePBX, Asterisk 1.4.19 and Elastix 1.1-7. I´m trying to
customize the macro-dialout-trunk code. I already put my macro-dialout-trunk code in
extentions_overrride_freepbx.conf, but always Asterisk takes the extentions.conf
What may be happening?
Thanks in advance

after adding it to the file did you reload? In the asterisk cli type reload.

Also I don’t have a FreePBX 2.3 build any more, but check the top of the extensions.conf file to be sure it is including that file otherwise that would be a good reason why not.