php - Magento open_basedir restriction in effect. File(/tmp) is not within the allowed path(s):

i'm having some trouble about uploading image on Magento CMS in all page/product.
I've enabled erro log and i'll report it to check.
NOTE: Only for post now, I have sobstitute my address domain with "mydomain.com". Only for sample.

[Sun Feb 02 15:02:14 2014] [error] [client 146.105.28.41] client
denied by server configuration:
/var/www/vhosts/mydomain.com/httpdocs/app/etc/local.xml

[Sun Feb 02 15:02:18 2014] [error] [client 146.105.28.41] client
denied by server configuration:
/var/www/vhosts/mydomain.com/httpdocs/app/etc/local.xml

[Sun Feb 02 15:02:36 2014] [warn] [client 151.67.115.48] mod_fcgid:
stderr: PHP Warning: Unknown: open_basedir restriction in effect.
File(/tmp) is not within the allowed path(s):
(/var/www/vhosts/mydomain.com:/usr/share/php:/usr/share/pear) in
Unknown on line 0

[Sun Feb 02 15:02:36 2014] [warn] [client 151.67.115.48] mod_fcgid:
stderr: PHP Warning: File upload error - unable to create a temporary
file in Unknown on line 0