Why is this htaccess redirect not working??

What if I wanted to redirect any request such as:

/demos/
/demos/files
/demos/index.php
/demos/files/index.php?action=Register

..to the new directory?...So that ANY request to ANYTHING in /demos will be re-routed?

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***This works...

RedirectMatch 301 ^/demos(.*)$ http://www.mydomain.com/new_dir