Login white screen

Hi all, have had Frontaccounting installed for several days, yesterday everything was fine, today I get a white screen after login.

In the errorslog you'll notice 'admin:connect_db.inc'  changes to ':connect_db.inc' in the log when it stopped working.  Any ideas why?

errors.log:

[27-Aug-2014 23:21:27 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[27-Aug-2014 23:21:34 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[27-Aug-2014 23:21:57 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[27-Aug-2014 23:21:58 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[27-Aug-2014 23:22:01 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[27-Aug-2014 23:22:34 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[27-Aug-2014 23:22:48 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[27-Aug-2014 23:22:52 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[27-Aug-2014 23:22:56 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[27-Aug-2014 23:23:03 Europe/Berlin] 0:admin:connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[28-Aug-2014 15:54:35 Europe/Berlin] 0::connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[28-Aug-2014 15:54:47 Europe/Berlin] 0::connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[28-Aug-2014 15:55:00 Europe/Berlin] 0::connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[28-Aug-2014 15:56:15 Europe/Berlin] 0::connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[28-Aug-2014 15:56:45 Europe/Berlin] 0::connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[28-Aug-2014 15:58:01 Europe/Berlin] 0::connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[28-Aug-2014 15:59:35 Europe/Berlin] 0::connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[28-Aug-2014 16:03:21 Europe/Berlin] 0::connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
[28-Aug-2014 16:03:48 Europe/Berlin] 0::connect_db.inc:27: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead

With the debug enabled to 1:

mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in file: /var/www/html/account/includes/db/connect_db.inc at line 27

With debug enabled to 2:

mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in file: /var/www/html/account/includes/db/connect_db.inc at line 27
/var/www/html/account/includes/db/connect_db.inc:27:     mysql_connect('localhost','bpi','Bashtar1020~~')
/var/www/html/account/includes/current_user.inc:67:     set_global_connection()
/var/www/html/account/includes/session.inc:506:     (current_user Object)->login('0','admin','')
/var/www/html/account/index.php:18:     include_once('/var/www/html/account/includes/session.inc')