No website thumbnail

Hi all

Hoping you can advise.

I created my website using iWeb, version 3.0.4 (601). Please see link

www.sophiakyriacou.com

I uploaded my website using SEO Tool for iWeb made by Rage Software and everytime I type my link out for example on facebook all I get is my URL repeated 3 times and no preview image. Does anyone out there have any ideas as I'm in the middle of updating my website and want to fix this.

Please see attached below to see what I'm referring to.

Best

Sophia