Problems Setting up a WP Network

Hi, I’m trying to make the installation (WP 3.2) on my development machine support multiple blogs but getting errors.

I followed the instructions in the ‘Create a Network of WordPress Sites’ document which included the steps listed below. Clearly, tables that WP expects didn’t get created but I have no idea why and now I can’t log in.

Any help would be greatly appreciated!
Thanks!

Here’s what I did.
1) I created a blogs.dir directory at Applications/MAMP/htdocs/blog/wp-content/blogs.dir and made it writable.

2) Added the following to wp-config.php
define( ‘MULTISITE’, true );
define( ‘SUBDOMAIN_INSTALL’, false );
$base = ‘/blog/’;
define( ‘DOMAIN_CURRENT_SITE’, ‘localhost’ );
define( ‘PATH_CURRENT_SITE’, ‘/blog/’ );
define( ‘SITE_ID_CURRENT_SITE’, 1 );
define( ‘BLOG_ID_CURRENT_SITE’, 1 );

3) Added the following lines to a new .htaccess file:
RewriteEngine On
RewriteBase /blog/
RewriteRule ^index\.php$ – [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule ^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]
RewriteRule . index.php [L]

When I logged in I got a message that ‘One or more database tables are unavailable. The database may need to be repaired.‘ I added define(‘WP_ALLOW_REPAIR’, true); to the wp-config.php.Then I ran the ‘Repair Database’ option and got the following errors:

wp_1_posts: Table ‘wordpress.wp_1_posts’ doesn’t exist
wp_1_comments: Table ‘wordpress.wp_1_comments’ doesn’t exist
wp_1_links: Table ‘wordpress.wp_1_links’ doesn’t exist
wp_1_options: Table ‘wordpress.wp_1_options’ doesn’t exist
wp_1_postmeta: Table ‘wordpress.wp_1_postmeta’ doesn’t exist
wp_1_terms: Table ‘wordpress.wp_1_terms’ doesn’t exist
wp_1_term_taxonomy: Table ‘wordpress.wp_1_term_taxonomy’ doesn’t exist
wp_1_term_relationships: Table ‘wordpress.wp_1_term_relationships’ doesn’t exist
wp_1_commentmeta: Table ‘wordpress.wp_1_commentmeta’ doesn’t exist