freeradius 2.2.6 on RHEL 6.8 doesn't write customize log

Hy,
I configured a new log authentication module :

/etc/raddb/sites-available/eduroam_logging

linelog eduroam_log {
filename = ${logdir}/eduroam-log
format = ""
reference = "eduroam_log.%{%{reply:Packet-Type}:-format}"
eduroam_log {
Access-Accept = "eduroam-auth#ORG=%{request:Realm}#USER=%{User-
Name}#CSI=%{%{Calling-Station-Id}:-Unknown Caller Id}#NAS=%{%{Called-Station-
Id}:-Unknown Access Point}#MSG=%{%{EAP-Message}:-No EAP Message}#RESULT=OK#"
Access-Reject = "eduroam-auth#ORG=%{request:Realm}#USER=%{User-
Name}#CSI=%{%{Calling-Station-Id}:-Unknown Caller Id}#NAS=%{%{Called-Station-
Id}:-Unknown Access Point}#MSG=%{%{reply:Reply-Message}:-No Failure
Reason}#RESULT=FAIL#"

and i enabled it by creatinf link soft:
llrwxrwxrwx. 1 root radiusd 26 21 set 11:28 eduroam_logging -> ../modules/eduroam_logging

Now service and auth work fine but in mylog dir (/var/log) i haven't eduroam-log; there's only radius.log

What's wrong?

Thanks in advance.
Guido