[Byron]

I have the following in my .htaccess

RewriteEngine on
RewriteRule ^/f([0-9]+)/s([^/]+?)$ /forumdisplay.php?forumid=$1&s=$2 [L]
RewriteRule ^/t([0-9]+)/s([^/]+?)\.html$ /showthread.php?threadid=$1&s=$2 [L]
RewriteRule ^/s([^/])+?/$ /index.php?s=$1 [L]

Kept getting 500 errors or 404 errors.

Are there any other commands which I need to include in the .htaccess?

Thanks