taxonomy.php fatal error

Im a newbie to wordpress. N i tried to create one as per the directions i’ve uploded all those files to zymic server. But when itried to run install.php the following error came n i got stuck up right here.plse gimme a solution.Thnx in advnce

Fatal error: Call to undefined function _x() in /www/zxq.net/h/a/c/hackwithme/htdocs/blog/wp-includes/taxonomy.php on line 355