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.

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