Logging not send to syslog file

Hi all,

I am not able to get logging on the file which has been created:

This is the conf for syslog

xxx@xxx# run show configuration system syslog
archive size 100k files 3;
user * {
    any emergency;
}
file messages {
    any critical;
    authorization info;
}
file interactive-commands {
    interactive-commands error;
}
file policy_session {
    any any;
    user info;
    match RT_FLOW;
    archive size 1000k world-readable;
    structured-data;
}

And this is on one of the other policys, so why am i not seeing any logs from the UNTRUST zone, im 100% sure that policy 299 is being hit with some traffic? 

    from-zone UNTRUST to-zone TRUST {
        policy 200 {
         xxxxx
            then {
                permit;
            }
        }
        policy 299 {
            match {
                source-address any;
                destination-address any;
                application any;
            }
            then {
                deny;
                log {
                    session-init;
                }
            }
        }