Comment Aprooval Problem, Please Help

I am using WordPress at our Blog https://www.starbytecomputers.com/blog/ .
If I click the approve comment links on the WordPress Dashboard or any of the comments pages (under comments, pending comments) the comment changes to suggest it’s approved, (under pending comments it disappears for example suggesting it’s gone to the approved comments, under comments clicking approve removed the yellow background), but upon refreshing the page (like clicking the pending link) they reappear as unapproved!

On the other hand multi aprooving comments working fine with Bulk actions Aproove> Apply method. Then why i am not able to aproove one by one?