TYPO3 Core

Hello,

I had a working TYPO3 backend login.
Then I realized that I had to login twice into the backend. So I used the new feature of TYPO3 4.6:

$TYPO3_CONF_VARS['BE']['cookieName'] = 'my-domain';

I put this into the file localconf.php and saved it. And I deleted the cookies of the domain.

Now tha backend ends up in an uncaught exception.

Uncaught TYPO3 Exception
#1270853884: TYPO3 Fatal Error: The current username, password or host was not accepted when the connection to the database was attempted to be established! (More information)

RuntimeException thrown in file
/home/my-domain/public_html/developer/typo3_src-4.6.3/t3lib/class.t3lib_db.php in line 1320.

2 t3lib_DB::connectDB()

/home/my-domain/public_html/developer/typo3_src-4.6.3/typo3/init.php:

00357: t3lib_utility_Http::redirect('install/index.php?mode=123&step=1&password=joh316');
00358: } else {

00359: $TYPO3_DB->connectDB();

00360: }
00361:

1 require("/home/my-domain/public_html/developer/typo3_src-4.6.3/typo3/init.php")

/home/my-domain/public_html/developer/typo3_src-4.6.3/typo3/index.php:

00036:
00037: define('TYPO3_PROCEED_IF_NO_USER', 1);

00038: require('init.php');

00039: require('template.php');
00040:

I do not know how I can log into the backend again, because there is always this uncaught exception error shown.

http://my-domain.eu/typo3/index.php

I have commented out the
// $TYPO3_CONF_VARS['BE']['cookieName'] = 'my-domain';
But no change.