My b2evolution Version: 2.4.1

After installation on my web I get this:
fidel.euweb.cz

Warning: ini_set dl pfsockopen openlog syslog readlink symlink link leak fsockopen proc_open glob copy() has been disabled for security reasons in /3w/euweb.cz/f/fidel/inc/sessions/model/_session.class.php on line 157

Fatal error: Call to a member function on a non-object in /3w/euweb.cz/f/fidel/index.php on line 77

And when trying to log in as an admin:

Warning: ini_set dl pfsockopen openlog syslog readlink symlink link leak fsockopen proc_open glob copy() has been disabled for security reasons in /3w/euweb.cz/f/fidel/inc/sessions/model/_session.class.php on line 157

Fatal error: Call to a member function on a non-object in /3w/euweb.cz/f/fidel/inc/_main.inc.php on line 447

What the hell is wrong?