Installing Drupal

Hi everyone,
I've just installed Drupal a few minutes ago and it looks really great.
I still have a problem creating the first user account :
I get the following error message :

Fatal error: DB Error: already exists query: INSERT INTO sessions (uid, sid, hostname, timestamp) values(0, '852f544d44b9ec0ab2f95007ae8f07f7', '192.[...].160', 1090473444) in /home/[...]/drupal/includes/database.pear.inc on line 89

Am I the only one to get this problem ? I did not see it in the forums and help,
Thank you for your help !
Ben

Hello all!
I´ve been reading sooo many posts here and I found that even if the host don´t have the configuration as Drupal needs, people can do something about it changing the htaccess file and maybe the config one.
I tried everything based on what I´ve readed here, but nothing seems to work!

This is my htaccess file:

# Various rewrite rules
<IfModule mod_rewrite.c>
  RewriteEngine on

  # Modify the RewriteBase if you are using Drupal in a subdirectory and the
  # rewrite rules are not working properly:
  RewriteBase /drupal

  # Rewrite old-style URLS of the form 'node.php?id=x':
  #RewriteCond %{REQUEST_FILENAME} !-f
  #RewriteCond %{REQUEST_FILENAME} !-d
  #RewriteCond %{QUERY_STRING} ^id=([^&]+)$
  #RewriteRule node.php index.php?q=node/view/%1 [L]

  # Rewrite old-style URLs of the form 'module.php?mod=x':
  #RewriteCond %{REQUEST_FILENAME} !-f
  #RewriteCond %{REQUEST_FILENAME} !-d
  #RewriteCond %{QUERY_STRING} ^mod=([^&]+)$
  #RewriteRule module.php index.php?q=%1 [L]

  # Rewrite URLs of the form 'index.php?q=x':
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
</IfModule>

# $Id: .htaccess,v 1.56 2003/12/18 18:53:11 dries Exp $

I have installed drupal on www.ligadelconsorcista.org/drupal
Is there a possibility that my htaccess file on the principal directory is causing me truble?
This is my principal htaccess file (inside public_html folder)

AddType text/html .shtml
AddHandler server-parsed .html
Options Indexes FollowSymLinks Includes ExecCGI

RewriteEngine On
Options +FollowSymlinks
RewriteBase /
RewriteCond %{HTTP_HOST} respuestas.ligadelconsorcista.org$
RewriteCond %{REQUEST_URI} !/respuestas/index.html
RewriteRule ^(.*)$ respuestas/$1

ErrorDocument 403 /error.html
ErrorDocument 404 /error.html
ErrorDocument 500 /error.html

And this is my config configuration:

Sorry I had to repost, nobody answered my old reply. Is the Lock Tables important to Drupal, my provider responded this morning that I can't have that option. It it time to switch providers? Or is there a better way?

I am getting a

: var: Deprecated. Please use the public/private/protected modifiers in C:\Apache\Apache2\htdocs\drupal\themes\xtemplate\xtemplate.inc on line 42.

error after the installation. I have read the installation guide and both of the php.ini directives are correctly set.

On down the page I get a

Notice: Undefined index: pass in C:\website\web\php\neil\drupal\includes\database.mysql.inc on line 12

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at C:\website\web\php\neil\drupal\includes\database.mysql.inc:12) in C:\website\web\php\neil\drupal\includes\session.inc on line 5

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at C:\website\web\php\neil\drupal\includes\database.mysql.inc:12) in C:\website\web\php\neil\drupal\includes\session.inc on line 5

Like others on this forum - I am getting redirected to my index page or directory listing as I removed the index.html. I am clicking on "create a new user" the hard links to drupal are of course working - it is only the register links that are not.
I know my email is set correctly on my mysql as I tested it earlier with this installation. I am working on a windows xp - for testing purposes only. My php and mysql are all in place.

What can I do to correct this problem?