mod_rewrite not working

[kbc1]

Hi all

Running locally on my machine, this mod_rewrite works perfectly...

------------------------------
Options +FollowSymLinks
RewriteEngine On
RewriteRule ^(/)?$

http://%{SERVER_NAME}/blue/home

[L]
RewriteRule ^blue(/)?$

http://%{SERVER_NAME}/blue/home

[L]
RewriteRule ^green(/)?$

http://%{SERVER_NAME}/green/home

[L]

<FilesMatch "^(blue|green)">
ForceType application/x-httpd-php
</FilesMatch>
------------------------------

Basically when someone hits my domain, I redirect them to to mydomain.com/blue/home and blue is a PHP file with the extension removed to implement tidy URLS. This is working great locally but when I upload it to my live web server, the redirect does not occur and the address bar of the browser simply stays at mydomain.com/

Strange thing is, when I change the redirect to something like /

http://www.bbc.co.uk

it does infact redirect without any problems.

Can any one offer suggestions as to why the redirect is not working?

Thanks in advance