Social Mobile Marketing Plugin Facebook not working on mobile site

Hi,

I'm using Social Marketing Plugin on regular website pages of the regioholic site where it's working just fine:
http://regioholic.com/uwbedrijf/mlp/de-virale-advertentie-een-must-have-optie-1/
But I also use it on a mobile site and noticed that the option Facebook isn't working:
http://regioholic.com/uwbedrijf/mlp/de-virale-advertentie-een-must-have-optie-1/
I've tested it on my mobile phone as well and option Facebook isn't showing up there either.

Can you do anything about that? Since the plugin without option Facebook is a bit a bummer.

Thanks in advance.
Jo