Custom headline does not work

Hi! I tried to add a custom headline by editing the css as specified in your instructions, but it doesn’t seem to work. I even did it in two different websites and I have the same problem in both: the headline does not appear (it is set in “on” in the plugin settings). Here is an example:

http://marketingaholic.com/como-verificar-cuenta-twitter/1989/

https://ww.wp.xz.cn/plugins/shareaholic/