Facebook like - Wrong image

[encreplus]

Good day ...

I have a problem with facebook like, when i click on it the result on my facebook page is the image of a flag ( language flag ) not the actual product image ... how can i fix this !!!

Here is the link http://dr-ink.ca/jupgrade/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=17&virtuemart_category_id=269&Itemid=203&lang=en

Stefan