htaccess and URL rewrite issue

I tried using the URL rewrite feature but it seems it's not working.
First, I've looked for htaccess.dist but couldn't find it with the cpanel file manager. Installed FileZilla and a .htaccess file was there (no htaccess.dist).

My forum is installed in the /forum folder, in the main root is a Wordpress site.

Tried enabling URL rewrite, but when I clicked on a forum or topic, it redirects me back to the Wordpress site.