Warning: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2) in /usr/local/www/vhosts/coolpromoproducts.com/dbconnect.inc on line 2

Warning: MySQL Connection Failed: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2) in /usr/local/www/vhosts/coolpromoproducts.com/dbconnect.inc on line 2
Database connection problem!
Please try again in a little while.