php install problem?

I've just installed, manually, php 4.0.5 and apache 1.3.22 on a RH 7.2 box. Php does work fine, however it is not able to access the mysql stuff that I installed. I first was using the PEAR modules and thought something was wrong with PEAR, but thought I'd better try the regular mysql_connect stuff. So I did and get an error. Ideas? Mysql was installed using RPM packages. Installed the same version of server, client and devel. I've got a username and password in the mysql database that I know works. Here's the error I'm getting. Warning: MySQL Connection Failed: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2) in /home/httpd/htdocs/include/db.inc on line 3 Warning: Supplied argument is not a valid MySQL-Link resource in /home/httpd/htdocs/include/db.inc on line 4 ERROR Thanks in advance. CD