Empty screen -_-

[DimkaStyle]

Greetings! Sorry for my english. I have a problem with installation GS on server, on local everything is ok. I download all files to server, CHMOD the folder /data/ to 755 and when I enter site there are nothing, only redirect to install.php and empty screen. When enable debugging there are such error:

Code:

Notice: Undefined variable: SITEURL in /home/altex/data/www/altex.com.ua/admin/inc/common.php on line 87

Notice: Undefined variable: SITENAME in /home/altex/data/www/altex.com.ua/admin/inc/common.php on line 90

Notice: Undefined variable: LANG in /home/altex/data/www/altex.com.ua/admin/inc/common.php on line 108

Warning: Cannot modify header information - headers already sent by (output started at /home/altex/data/www/altex.com.ua/admin/inc/common.php:87) in /home/altex/data/www/altex.com.ua/admin/inc/common.php on line 129

PHP Version 5.2.12
mod_rewrite on
site: http://altex.com.ua Can someone give me advice?