erro conexao

Warning: mysqli_connect() [function.mysqli-connect]: (HY000/2003): Can't connect to MySQL server on 'localhost' (10048) in C:\inetpub\vhosts\xxxxxxxx.com\subdomains\site\httpdocs\banco\conecta.inc on line 8

Warning: mysqli_select_db() expects parameter 1 to be mysqli, boolean given in C:\inetpub\vhosts\xxxxxxxx.com\subdomains\site\httpdocs\banco\conecta.inc on line 9

Conexao Falhou: Can't connect to MySQL server on 'localhost' (10048)

isso acontece de vez enquando, mas qnd dou f5 a pagina volta ao normal..

alguemtem um uma ideia do que possa ser?