Error logging into Plesk !

[Toepes]

I made a mistake by opening port 1433 MSSQL for a short while. I think that attemps are made of hacking the database.

All websites with MYSQL ans MSSQL work fine. Problem is that i can't login to plesk anymore:

I notice that something tries to login as admin every 1 minute 4sec. This is an index.php. The logfile of FTP doesn't show any uploads of this short before the error.

ERROR: PleskMainDBException
<b>Source:</b> Microsoft OLE DB Provider for SQL Server<br/><b>Description:</b> [DBNETLIB][ConnectionOpen (Connect()).]De SQL-server bestaat niet of de toegang tot de server is geweigerd.

0: C:\Program Files\SWsoft\Plesk\admin\plib\common_func.php3:589
reconnect()
1: C:\Program Files\SWsoft\Plesk\admin\plib\common_func.php3:561
db_connect()
2: C:\Program Files\SWsoft\Plesk\admin\auto_prepend\auth.php3:68


Who can help, this is urgent.