Erro Mysql

Bom Dia, quando entro na área admin aparece esse erro, já hospedei meu site em dois host e continua com esse erro o que pode ser ?

Warning: mysql_connect() [function.mysql-connect]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/ivan/public_html/site/admin/funcoes/conexao.php on line 7

Warning: mysql_select_db() [function.mysql-select-db]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/ivan/public_html/site/admin/funcoes/conexao.php on line 8

Warning: mysql_select_db() [function.mysql-select-db]: A link to the server could not be established in /home/ivan/public_html/site/admin/funcoes/conexao.php on line 8

Warning: mysql_query() [function.mysql-query]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/ivan/public_html/site/admin/funcoes/conexao.php on line 9

Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /home/ivan/public_html/site/admin/funcoes/conexao.php on line 9

Warning: mysql_query() [function.mysql-query]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/ivan/public_html/site/admin/home.php on line 35

Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /home/ivan/public_html/site/admin/home.php on line 35

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/ivan/public_html/site/admin/home.php on line 37