mod_rewrite question

["Alain Roger" <raf.news@xxxxxxxxx>]

Hi,

i would like to rewrite some of my pages so i have the following .htaccess file under my subfolder _sub/test/

Options +FollowSymlinks
RewriteEngine on
RewriteRule ^article-([0-9]+)-([0-9]+)\.php$  article.php?numero=$1&page=$2  [L]

i also have 1 file article.php which only display the numero and page arguments.

therefore when my browser try to reach the page article-1234-5.php (as written into my address bar of my browser), apache redirect it to article.php?numero=1234&page=5

however i get the 500 error.
i do not get the 500 error if i comment the Options +FollowSymlinks (with #), but in this case i get a 404 Not Found (/_sub/test/article.php)

what is the problem ?
thx.

--
Alain
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Windows XP SP2
PostgreSQL 8.2.4 / MS SQL server 2005
Apache 2.2.4
PHP 5.2.4
C# 2005-2008