error while installing

while installing from admin i got this error:
Fatal error: Call to undefined function ftp_connect() in /usr/local/www/vhosts/mydomain/www/htdocs/libraries/joomla/filesystem/helper.php on line 169

Fatal error: Access to undeclared static property: JLoader::$classes in /usr/local/www/vhosts/mydomain/www/htdocs/libraries/loader.php on line 189

fixed, did install from server