Re: Rewrite url Problem
The syntax of that file is OK (I tried it on my forum), so if it is giving you a 500 error, your host does not allow the directives you’re trying to use in .htaccess. Check with your host to see if .htaccess is allowed and what directives are allowed in it.
If the 500 error was with
Options +MultiViews then the host just does not allow that. If this .htaccess file with all the rules does not work, please explain what happens or post a link to your forum.
Also, be sure you save the file as .htaccess beginning with a period (hidden file on *nix.)