Facebook posts Pinterest thumbnail

Hello,

I am a facing issues with the Facebook buttons (both the like and send a message), it is linking properly and posting to Facebook however it posts the Pinterest logo as thumbnail instead of the photo on the page.

Any ideas on how to resolve that?
Check out the problem in any of the articles of www.mounay.com

Hi

Facebook is picking up the first image in code as default, please use one of open graph's plugins to point a correct image.