WordPress: Error establishing a database connection

or if you would like, try running this query on mysql.

SET PASSWORD FOR some_user@some_host = OLD_PASSWORD('your_old password_here');

are you using mysql 5?

If there's a "bump" in the mysql service, then something may very well have changed, which renders the settings in wp-config.php moot.

If you have phpmyadmin then go to SQL and run the above query. That could prove to  be the easiest way to solve it.

I think I'm out of my depth here.

1.  An install bug.
I don't understand. My knowledge of PHP is very limited - MySQL zero. This blog has been in successful use since the last upgrade to WordPress 2.5.1.

2.  BlueHost is running MySQL5. The current password seems to work. It's just that logging on doesn't take me anywhere.
Just to confuse the issue (for me at least). I have 5 MySQL databases and I can't figure out in cPanel which belongs to this particular blog.

A little knowledge is a dangerous thing...

:o(

3.

Now when I go to the site I don't even get the error message. Just a blank page.

ok the database should have a wp_ somthing in its tables and database name

That's another problem syedasimmeesaq. See this new question:
http://www.experts-exchange.com/Database/MySQL/Q_23458034.html
:o)

OK. I now know which database I'm working with. Thanks Nexusnation.

:o)

Good, now check the wp-config.php files and make sure everything is right. :-)

It probably is; usually it's another issue such as what syedasimmeesaq has posted.

I get this when I use my site logon and similar if I use my blog logon:
______________________________________________________________

SQL query:

SET PASSWORD FOR mistywin = OLD_PASSWORD( 'myOldPassword' )

MySQL said: Documentation
#1044 - Access denied for user 'mistywin'@'localhost' to database 'mysql'
______________________________________________________________

Attached is the wp-config.php file. Looks alright to me, but what do I know? !

I note that the size of this database is about half that of my other blogs, but this one should be the biggest. It had more posts and more comments. Not a good sign I suspect.

<?php
// ** MySQL settings ** //
define('DB_NAME', 'mistywin_wrdp1'); // The name of the database
define('DB_USER', 'mistywin_wrdp1'); // Your MySQL username
define('DB_PASSWORD', 'k2FXYPZfWrR4'); // ...and password
define('DB_HOST', 'localhost'); // 99% chance you won't need to change this value
define('DB_CHARSET', 'utf8');
define('DB_COLLATE', '');
// You can have multiple installations in one database if you give each a unique prefix
$table_prefix = 'wp_';
// Only numbers, letters, and underscores please!
// Change this to localize WordPress. A corresponding MO file for the
// chosen language must be installed to wp-content/languages.
// For example, install de.mo to wp-content/languages and set WPLANG to 'de'
// to enable German language support.
define ('WPLANG', ''); 
/* That's all, stop editing! Happy blogging. */
define('ABSPATH', dirname(__FILE__).'/');
require_once(ABSPATH.'wp-settings.php');
?>

                                              

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Thanks for your patience.

I'd already tried that first option logon and password.

I'll now try your option 2. May take a while for me to figure it out.  I'll probably wait until I get another reply from BlueHost - sometime next century - before making any changes. Just in case I stuff things up further OR BlueHost say that I have.

can you tell me your current problem, what was resolved and what still need to be fixed

I think Vallis wants to wait on Bluehost. However if they don't reply you :-) as you mentioned, you may try the option that I told you by changing the configuration files user name. You can always change it back. Let us know.
Thanks

Thanks people.
I'm on hold at the moment. BlueHost told me they couldn't help yesterday. This morning my time (GMT +12) they said they can.
I'll give it another 24 hours and then apply some of what I've learned here and elsewhere.

Best of luck

Bluehost have been no help and communication with them is so slow as to be useless. They can't log onto my database using my logon details.

The same problem occurred with this same blog some months ago.
I got this answer after Bluehost went in and changed the password:

"Generally speaking this will happen for only one of two reasons: Either the password associated with the user name was changed somehow, or someone changed the password in the wp-config.php file. Chances are the password simply became corrupted and needed to be refreshed."

Great.

Current situation:
1.    I tried to reset the password as suggested above without success.
2.    Now, instead of the original error message I just bet a blank screen if I go to the blog's URL.
3.    If I go here: http://mywitsend.co.nz/wp-login.php  I get a login screen but when I logon using my password or the password shown in wp-config.php nothing happens.
4.   If I click on the lost password link I get an email with a reset link: http://www.wp-login.php/?action=rp&key=StDxR&x4f9Vp
That link doesn't exist.

I am resigned to probably having to set up this blog again from scratch, but would be very pleased if I could recover the text of my posts.

@   syedasimmeesaq:
You said above:
"..... go to myadmin and add a user and give the user the privileges that you want to give him......"

If you mean my blog Admin, I can't access the site so I can't do that.

Or am I misunderstanding you?

I can only access this blog, which is an addon domain, from my host's control panel.

Probably.
:o)
It occurred to me, I'd be happy to do that if I thought it would work.

please take a backup and try:)

Managed to resurrect the blog but the database is trashed. Just like my backups.
:o)