Can not connect to MySQL server

The URL is:
http://www.kevinpromotion.com
Warning: mysqli_error() expects parameter 1 to be mysqli, boolean given in D:\wwwroot\kevinpromotion\inc\mysql_connect.php on line 239

Warning: mysqli_errno() expects parameter 1 to be mysqli, boolean given in D:\wwwroot\kevinpromotion\inc\mysql_connect.php on line 214


MySQL server error:
( 0 )