Installation problem on CentOS 5.1

[rickygestalt]

continue....
after the installation I verify that in the file
/var/log/httpd/users/admin.gestalt.it-error.log
I found these errors:
[Thu Mar 13 00:11:10 2008] [error] [client 192.168.0.1] PHP Warning: Unknown: open_basedir restriction in effect. File(/var/www/ispcp/gui/index.php) is not within the allowed path(s): ({WWW_DIR}/{DMN_NAME}/:{CONF_DIR}/:{MR_LOCK_FILE}:/proc/:/bin/df:/bin/mount:{RKHUNTER_LOG}:{CHKROOTKIT_LOG}:{PEAR_DIR}/{OTHER_ROOTKIT_LOG}) in Unknown on line 0