Calendar stopped working

I had the calendar working successfully for some time -- a year or more.

It stopped working. I get this message where I should see the calendar:

Error: Connection to MySQL database 'unquapta_org' failed.
>1044: Access denied for user: 'unquapta@localhost' to database 'unquapta_org'
Error: Connection to MySQL database 'unquapta_org' failed.
>1044: Access denied for user: 'unquapta@localhost' to database 'unquapta_org'
Error: A problem was encountered while executing this query
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I have checked ltw_config php
My database name, user name and password are correct.

You can see my uncalendar here:

http://www.unquapta.org/cal/calendar.php

If I run install again, will I lose all my data?
Can I save ltw_events? Maybe I can rename it and then when I reinstall, name it back.

Oops. Nevermind. I found the error.