WordPress import and export not working

I use the plugin BuddyPress (paid plugin) that will do this. If you scout around there are some free ones. Remember you have to copy both the database and all the files to get it to replicate. You need to edit the mySQL export (the database) and change all the URL’s pointing to the old domain name to the new domain name. And you need to make sure the database name is the same or that you change the wp-config.php to agree wiith the new database you have.