How To Control Facebook Thumbnail When To Share Something From Post ?

[BUDIMAN]

Hi all


i have a big problem here.


I use vb 3.8.6 & VBSEO 3.5.1


i used Facebook share button based on this : http://www.facebook.com/share/

and i have put the code in headinclude based on this : http://wiki.developers.facebook.com/...ying_Meta_Tags

<meta name="title" content="title" />
<meta name="description" content="description " />
<link rel="image_src" href="thumbnail_image" / >

and i have set the correct location of thumbnail image


My question :

Why the thumbnail image still didnot appear at all ? what else i need to edit ? it only shows random photo such as user avatar, banner ads and others useless photo to be used as thumbnail.


or, do someone have any suggestion, which one facebook share method is better ?


Pleasae guys...