Http-chek send error

Hi there,

We’re using version 2.0.13 in Ubuntu and i’m trying to configure the http-check send as the documentation says But i don’t know why the config check said:

[ALERT] 123/142618 (247947) : parsing [/etc/haproxy/haproxy.cfg:53] : 'http-check' only supports 'disable-on-404', 'send-state', 'expect'.

My config file looks like this:

backend nodes
        mode http
        option httpchk POST / HTTP/1.1
        http-check send hdr Content-Type application/json  body {\"jsonrpc\":\"2.0\",\"method\":\"getHealth\",\"id\":1}"
        #http-check expect string "{\"jsonrpc\":\"2.0\",\"result\":\"ok\",\"id\":1}"
        server node1 check

Someone know whats going on? is it the version?