Piwigo encountered a non recoverable error

[mysql error 2002] No connection could be made because the target machine actively refused it.

Can't connect to server

#1	my_error \\WINDOWS-PD-0001.FS.LOCAWEB.COM.BR\WNFS-0001\odontologiaestet1\web\piwigo\include\common.inc.php(115)
#2	include_once \\WINDOWS-PD-0001.FS.LOCAWEB.COM.BR\WNFS-0001\odontologiaestet1\web\piwigo\index.php(30)