[alexgeek]

I have a problem!
My site: Unmoderated Forums
As you can see if you click the sitemap URL (/sitemap/ - it generates a 404 page.
If you visit /sitemap/index.php though, the page appears!
What's wrong?
Thanks


And this is my htaccess:

Options +FollowSymlinks
RewriteEngine on

RewriteRule ^([a-z0-9_\-]*-(f|all)[0-9]+(p[0-9]+|/index[0-9]*)?\.html)$ forumdisplay.php/$1 [QSA,L]
RewriteRule ^([a-z0-9_\-]*-(t|p)[0-9]+(p[0-9]+|/index[0-9]*)?\.html)$ showthread.php/$1 [QSA,L]
RewriteCond %{REQUEST_URI} !(index\.php|\.css) [NC]
RewriteRule ^(archive|sitemap)/(.*)$ $1/index.php/$2 [QSA,L]