.htaccess not matching wildcard subdomains

[singedpiper]

my .htaccess is, (like every n00b's) acting up on me...

I have wildcard subdomains turned on and pointing to the document root...

i have an index.php to catch errors, and a parse.php to catch successes, as a test.

if I enter mysite.org/not_a_folder, i get to parse.php, however, if i enter not_a_folder.mysite.org, i see index.php instead.

this implies an error with my first set of conditionals that I cannot find... the regex is my own, so that might be the issue, but it could just as well be me.

# BEGIN REWRITE
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !www.mysite.org$ [NC]
RewriteCond %{HTTP_HOST} ^(www.)?([a-z0-9-_.]+).mysite.org [NC]
RewriteRule ^(.*)$ /parser.php  [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /parser.php  [L]

</IfModule>

any help would definitely be appreciated

[singedpiper]

realized that i really don't need to store the subdomain, just test that there is one, but it appears to still not work

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !www\.mysite\.org$ [NC]
RewriteCond %{HTTP_HOST} !^mysite\.org$ [NC]
RewriteRule ^(.*)$ /parser.php  [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /parser.php  [L]

</IfModule>