Can't connect to local MySQL server through socket.. ?

I have an admin area for one page on shared hosting. And I wanted to protect it by shared SSL from my hosting company. I got from them Your domain, afan.net, can now access our shared SSL certificate. To securely access the documents folder, go to ... https://secure.inetwave.com/afan/filename But, when I go to my admin area https://secure.inetwave.com/afan/admin I'm getting Warning: *Warning*: mysql_connect(): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in */web/home/afan/admin/includes/functions.php* on line *120* Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) line 120 in file functions.php is

117    #    DATABASE CONNECTING
118    function db_connect($host, $user, $password, $db_name)

119 {

120       mysql_connect($host, $user, $password) or die (mysql_error());
121       mysql_select_db($db_name) or die (mysql_error());

122 } ???? -afan