[SR-Users] Kamailio does not start with #!define WITH_AUTH

When the following lines are on top of my kamailio.cfg #!KAMAILIO #!define WITH_MYSQL #!define WITH_NAT #!define WITH_TLS #!define WITH_AUTH Kamailio does not start and prints out root@voip:/etc/kamailio# /etc/init.d/kamailio start [....] Starting Kamailio SIP server: kamailio:loading modules under /usr/lib/x86_64-linux-gnu/kamailio/modules/ Listening on udp: 127.0.0.1:5060 udp: 107.170.93.193:5060 tcp: 127.0.0.1:5060 tcp: 107.170.93.193:5060 tls: 127.0.0.1:5061 tls: 107.170.93.193:5061 Aliases: tls: voip:5061 tls: localhost:5061 tcp: voip:5060 tcp: localhost:5060 udp: voip:5060 udp: localhost:5060 [FAIL] already running ... failed! . ok But when I remove "#!define WITH_AUTH" it starts up. How can I find out what the problem is?