Can't run WP Install script with 1and1 Host

Hello. I wonder if someone can help me. I am trying to install WP with 1and1 hosting. I have tried automatically letting the config file run but without success. I then manually entered the details, checked and re-checked but if I try and point to my site it just tells me that there is an error establishing a DB connection.

I am using Filezilla on a Mac and here is a copy of my config file

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// ** MySQL settings - You can get this info from your web host ** //
/** The name of the database for WordPress */
define('DB_NAME', 'db463029262');

/** MySQL database username */
define('DB_USER', 'don't post that here');

/** MySQL database password */
define('DB_PASSWORD', '********'); 

/** MySQL hostname */
define('DB_HOST', 'honestly don't);

/** Database Charset to use in creating database tables. */
define('DB_CHARSET', 'utf8');

/** The Database Collate type. Don't change this if in doubt. */
define('DB_COLLATE', '');

I am beginning to wonder if its a problem with where I have put WP on the Host. I uploaded it to the root directory but the remote site address in Filezilla reads the user name ie /u1234567/mywebsite.co.uk

Its driving me nuts 🙁 and I would appreciate any help you can give.

Thanks, Graham