Piwigo encountered a non recoverable error

[mysql error 1049] Unknown database 'epm_gg'
Connection to server succeed, but it was impossible to connect to database

#1	my_error /home/www/gg-blokhus.dk/galleri-ny/include/common.inc.php(113)
#2	include_once /home/www/gg-blokhus.dk/galleri-ny/random.php(14)