The use of Open Graph tags on your web page is the critical element that allows the right picture to be captured for your product when using the Like button. This way when a user clicks on a Like button on your page, a connection will be made between that page, appropriate image and the user.
To enable the Open Graph tags on your web site we recommend these two sources to review:
Additionally, some users are seeing errors when a Like is clicked or a comment is made on the Like. This may also be tied to Open Graph tags.
If you go to : https://developers.facebook.com/docs/reference/plugins/like/ under the "Open Graph Tags" section, it says "If you use Open Graph tags, the following six are required:" and that includes the fb:admins or fb:app_id. Make sure all Open Graph tags are coded.