Run a custom .AGI script in freebbx

I have installed a P.I.A.F v 1.1 on a server and im trying to run a .AGI script that i've placed under /var/lib/asterisk/agi-gin i've set up my extensions_custom.conf like this
exten => s,1, Wait (6)
exten => s,2, Answer
exten => s,3, AGI (xxxxxxx.agi)
exten => s,4, Hangup
and when i call using SIP protocol
the agi file launches and then returns 0 errors and doesnt run the script
and the agi file works fine on a native asterisk server
is there a way to load this agi file in freepbx?
if there a way to load the agi file in the GUI?
any ideas?
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Check file permissions
Is your AGI file owned by Asterisk and are the permissions set the same as the other AGI files on the system?
the AGI file i think it is
the AGI file i think it is owned by asterisk, because if i use a native asterisk server it will run, and at first in freepbx it gave me a permission denied, i then ran chmod 775 xxxxxx.agi to give it permissions and then the error of permission denied went away and i went to the agi complete 0 errors message