Apache Rewrite Rules

[Daniel C.]

Having some trouble with rewrite rules.  Here's the rule and surrounding lines:

RewriteEngine On
RewriteLog /var/log/httpd/rewritelog
RewriteLogLevel 9
RewriteRule ^/invoices/?([^/]*)/?([^/]*)/?([^/]*)/?  \
      /invoices/index.php?year=$1&month=$2&day=$3    [PT]

If I understand correctly this should send requests to

voip-call.us/invoices/2006/10/26

to this URL

voip-call.us/invoices/index.php?year=2006&month=10&day=26

but when I hit the first URL above I get a 404.  The error log shows
the 404, and the rewrite log (which is writable by Apache) shows
nothing.

Can anyone see the problem I'm missing?

Dan