Share content on users FaceBook Wall or Timeline using sharethis in ASP.Net

hi,

i am using sharethis.com to share my product details on social website it is working absolutely fine the only problem is that when user click on share button instead of sharing the specific product details its all the time shares website title, meta tag and a static image.

the screen shot shows that is sharing wrong image https://snag.gy/zN9xVf.jpg

please advice