Hello onder,
Sorry for late reply to this,
Did you open the Facebook debugger tool result when i paste your blog post URL in the debugger tool?
The Facebook is getting this image URL link ->
http://e-hayalet.net/images/Mahzuni_^erif.jpg
If you try to open this link, it will redirect to JomSocial homepage, I'm suspected that was because your image file name is using umlaut language, so the Facebook will not getting the correct URL link, so the Facebook image will not show out.
Then i have tried to create a test post in your site, I have uploaded a image file without using any umlaut language,
->
http://www.e-hayalet.net/index.php/bloglar-mainmenu-216/entry/test-post (my test post)
But the Facebook debugger result also show out can't get my image file even no including any umlaut language there, then i try to access this image URL link,
->
http://e-hayalet.net/images/easyblog_images/753/b2ap3_thumbnail_golden-blogger.jpg
But i hitting the 403 permission error, please have a check my attachment screenshot below.
You have to consult with your Webhosting provider regarding this and see how it goes. Please advise.