Incompatible with WordPress 3.9 PHP 5.5

Error on the page of the post:
Warning: mysql_get_server_info(): Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2) in /web/htdocs/www.sgnuffitech.it/home/sito/wp-content/plugins/xml-google-maps/xmlgooglemaps_dbfunctions.php on line 10 Warning: mysql_get_server_info(): A link to the server could not be established in /web/htdocs/www.sgnuffitech.it/home/sito/wp-content/plugins/xml-google-maps/xmlgooglemaps_dbfunctions.php on line 10

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