hi all,
i have configure tls support as this link: http://www.kamailio.org/docs/tls-devel.html#id2451496
and i add certificate to 3CX sip phone is "cacert.pem"  but when i register sip phone, the log file in kamailio server is :

Sep  9 15:13:36 appliance /usr/local/sbin/kamailio[2146]: ERROR: tls [tls_server.c:392]: SSL error:error:14094412:SSL routines:SSL3_READ_BYTES:sslv3 alert bad certificate

my configure in kamailio.cfg as :

modparam("tls", "tls_method", "TLSv1")
modparam("tls", "tls_method", "SSLv23")
modparam("tls", "certificate", "/usr/local/etc/kamailio//tls/user/user-cert.pem")
modparam("tls", "private_key", "/usr/local/etc/kamailio//tls/user/user-privkey.pem")
modparam("tls", "ca_list", "/usr/local/etc/kamailio//tls/user/user-calist.pem")
modparam("tls", "verify_certificate",0 )
modparam("tls", "require_certificate",0 )


please suggest to fix this error.
thanks and regards.
Peter Green.