Post.php script exceeding execution time

Hello,

We’re having problems with 123-reg. They suspend websites if they detect a script running for over two minutes.

123-reg have identifed post.php which is the script that is causing the problem. We have put max execution time (90 seconds) and its counterparts into the HTACCES, php.ini and wp-config. Yet nothing seems to fix this issue.

We are getting the issue when in the backend(dashboard)and when we are editing a page.