Elastix Blacklist caller not working

Here is how to enable Blacklist to work

Go to PBX -> Tools - >  Asterisk File editor

Find a file called extensions_custom.conf

Append the following at the end

[app-blacklist-check]
include => app-blacklist-check-custom
exten => s,1(check),GotoIf($[“${BLACKLIST()}”=”1″]?blacklisted)
exten => s,n,Set(CALLED_BLACKLIST=1)
exten => s,n,Return()
exten => s,n(blacklisted),Answer
exten => s,n,Wait(1)
exten => s,n,Zapateller()
exten => s,n,Playback(ss-noservice)
exten => s,n,Hangup

Enjoy :)