Come si risolvono questi errori??

[Traxsung]

Ho installato oscommerce e mi visualizza questi errori:

Warning: is_dir() [function.is-dir]: open_basedir restriction in effect. File(/tmp) is not within the allowed path(s): (/tmp/:/var/www/netsons.org/xxx/:/var/lib/php5/:/usr/share/php/:/usr/share/php/) in /var/www/netsons.org/xxx/ok/includes/header.php on line 30

Warning Warning: I am able to write to the configuration file: /var/www/netsons.org/xxx/ok/includes/configure.php. This is a potential security risk - please set the right user permissions on this file.

Warning Warning: The sessions directory does not exist: /tmp. Sessions will not work until this directory is created.

Come posso ovviare ?


Grazie


Saluti
Traxsung