title: .htaccess RewriteRule working for some works, throwing a 404 for others
body: <p>I have written the following Rewrite Rules:</p>
  
  <pre><code>Options +FollowSymLinks -MultiViews
  RewriteEngine on
  
  RewriteRule ^add-post/([0-9]+)/([0-9a-zA-Z-]+)/$ add_post.php?thread_id=$1thread_name=$2 [NC,L]
  RewriteRule ^search/?s=([0-9a-zA-Z-]+)/$ search.php?s=$1 [NC,L]
  RewriteRule ^([0-9a-zA-Z-]+)/$ lvl1_forum.php?forum=$1 [NC,L]
  RewriteRule ^([0-9a-zA-Z-]+)/([0-9]+)/([0-9a-zA-Z-]+)/$ lvl2_thread.php?forum=$1&amp;thread_id=$2&amp;thread_title=$3 [NC,L]
  </code></pre>
  
  <p>The rule is working for all of the pages, except for add_post.php (which exists). I've tried the .htaccess with the Options line at the top of the file and below the RewriteEngine on rule but no dice.</p>
  
  <p>How can I modify this file to make the add-post rule work?</p>