.htaccess RewriteRule with cookies not working

The Joomla CMS Platform has an /administratotr/ folder which cannot be renamed. I'd like to secure it by requiring a custom url parameter to access it – I.E. /administrator/index.php?token=1149785380. After accessing this url, an html session cookie should be used to allow access for the duration of their browser session. Any thoughts what could be wrong with my code?

## /administrator/.htaccess

## Begin Admin Folder Security

RewriteEngine On

# if the url token is present, set the cookie
RewriteCond %{QUERY_STRING} ^token=1149785380$
RewriteRule ^ - [CO=jtywrxsoiq:8360937614:%{HTTP_HOST},L]

# if the cookie is not present, invoke the root directory
RewriteCond %{HTTP_COOKIE} !jtywrxsoiq=8360937614
RewriteRule (.*) ../

## End Admin Folder Security