create a friendly url using the rewrite mod
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im trying to create a friendly url using the rewrite mod in php with no sucess!


without the friendly url

    http://www.mywebsite.com/lyrics/index.php?letter=a

with the friendly url

    http://www.mywebsite.com/lyrics/a/

my attempt with no success:

    RewriteRule ^lyrics/([A-Z])/?$ /index.php?letter=$1 [L]

help!