I am attempting to upload Omeka on a BlueHost server and I'm receiving a 404 error when I attempt to go to the main page to install. I followed the instructions from the Omeka installation codex and I believe I've hit all the steps. I've tried different choices for the database host based on some of the other forum posts: localhost, 127.0.0.1, mysql, mysql.localdomain, and my site's IP address. The other fields should be correct (username, password, database name).
I also made sure that the .htaccess is in the root directory and it appears to be the correct Omeka version:
# Remember to enable display_errors on development environments only.
<IfModule mod_php5.c>
php_value display_errors 0
php_flag register_globals off
</IfModule>
RewriteEngine on
# If know that mod_rewrite is enabled, but you are still getting mod_rewrite errors,
# uncomment the line below and replace "/" with your base directory.
RewriteBase /omeka
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^admin/ - [C]
RewriteRule .* admin/index.php [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule .* index.php
<FilesMatch "\.(php|ini)$">
Order Allow,Deny
Deny from all
</FilesMatch>
<Files index.php>
Allow from all
</Files>
# Uncomment the lines below in order to enable caching of some files via Apache (after a finished site has gone live)
<IfModule mod_expires.c>
# <FilesMatch "\.(js|ico|gif|jpg|png|css)$">
# ExpiresActive on
# ExpiresDefault "access plus 10 day"
# </FilesMatch>
</IfModule>
I don't have too much in the way of formal technical skills so I'm not quite sure what my next step should be to troubleshoot. The site is http://www.qcarchives.com/omeka (omeka is the folder I created for the upload of the files). Any suggestions?

