mySQL Error! Function: db_Query (). [2002 - Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)]

Warning: main(themes//theme.php): failed to open stream: No such file or directory in /home/groups/s/sh/shellwm/htdocs/class2.php on line 508

Fatal error: main(): Failed opening required 'themes//theme.php' (include_path='.:/usr/local/share/pear') in /home/groups/s/sh/shellwm/htdocs/class2.php on line 508