[SR-Users] if (t_check_status("486|408"))

[hiro]

i'm trying to use the example kamailio.cfg to route to voicemail
server on busy or decline.
Only thing I did was adding decline code to t_check_status("486|408"),
enabling the preprocessor variable for voicemail and changing the
voicemail host and port to my voicemail server.
No requests arrive on my voicemail server and the dial tone keeps
ringing even if phone is busy and when I decline on the receiving
phone there's a new INVITE sent to the phone directly afterwards.
Am I doing something wrong here?