急,求助啊

Question

mysql5.0.22
php5.0.14
apache2.0.23
启动都没问题,但是在访问时出现以下错误.

Discuz! info: Can not connect to MySQL server

Time: 2006-10-24 7:48am
Script: /index.php

Error: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)
Errno.: 2002