How to receive source IP address?

did so

global
maxconn 4096
chroot /usr/share/haproxy
uid 99
gid 99
daemon

frontend test
mode tcp
bind *:6666
default_backend test1

backend test1
source 0.0.0.0 usesrc client
server server 88.94.34.119:6666

did not help
I still get ip of the balancer