Htaccess / regex / php I dont know why it won't work

Hi, I have a website hosted on a cobalt server with my own domain, but not my own IP. I have a full access to my root web, but not higher (means can't change any *.conf files). My domain is "wildcarded" I want to be able to redirect based on the entry, IE if a user types http://hello.mydomain.com he will go to http://mydomain.com/hello=20 if a user types http://another.mydomain.com he will go to http://mydomain.com/another=20 The redirect method of apache doesn't work because I leanred that that is based on an absolute path from the server I tried php scripts that read the subdomain and use it in the header function but it won't work. I came to the conclusion after a lot of tests that rewriterule from the htaccess is the the best. htaccess script: (doesn't work) RewriteEngine On RewriteRule ^(.*)\.zajfe\.org$ redirect.php?url=$1 [L] connected to the page redirect.php where <?header("location:http://www.zajfe.org/$url");?> PHP script: (doesn't work) <? $domain = "yourdomain.com"; $default_page = "main.shtml"; $underdomaene = $HTTP_HOST; $underdomaene = eregi_replace("\.".$domain, "", $underdomaene); $underdomaene = eregi_replace("www\.", "", $underdomaene); $underdomaene = strtolower($underdomaene); if (is_dir("$DOCUMENT_ROOT/$underdomaene")) { header("Location: http://$domain/$underdomaene"); } else { if (!$REQUEST_URI || $REQUEST_URI == "/") { include("$DOCUMENT_ROOT/$default_page"); } else { header("Location: http://$domain$REQUEST_URI"); } } ?> I am open to ANY suggestion, CGI / ASP / PHP / SSI (it is all on the server), I want it to work Thanks Gab