[syslog-ng]Sudden dead

Hello world. I had installed syslog-ng 1.4.15 & libil 0.2.23 sometime ago in a red hat 7.2 box, it works fine as central logger for varius serevers some time, but suddenly it dead. When the daemon is started it show the literal Ok, but the truth is that there is no process running, if I run /etc/rc.d/initd/syslog-ng status it told me that is stopped but that there is a PID file, I didn`t know where syslog-ng log its own activity to be able to see what is wrong, any idea? thanks in advance.