I'm trying to set up a .htaccess redirect for a site I've inherited. It used to use php and strings - now it is straight xhtml.

The previous web address would be:
www.somesite.com/home_state.php?page=careers

The new address is:
www.somesite.com/careers.html

Everything I try for the 301 redirect goes to a 404 error.

For example:
Redirect 301 /home_state.php?page=careers http://somesite.com/careers.html

What else might I need in the .htaccess to make this work?