500 internal server error

Your site codereflect.com is not that heavy. Could be the Suffusion theme and its options making lots of DB calls. I’d use http://wordpress.org/extend/plugins/debug-queries/ to see what queries are being called and how many. And it also could be you’re on a shared box at softlayer that is “too” shared with others.

Copying wordpress to another server breaks it on original server

If you didn’t hand-change the wpurl in the dev database, what probably happened is that you entered your url, and WP made a 301 redirect to the live site. Then, without realizing it, you changed the url config in your live site. To make it work: Put this in your wp-config.php define(‘WP_SITEURL’, ‘http://your-wp-url.com’); define(‘WP_HOME’, ‘http://your-wp-url.com’); … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)