after install all i see is ERROR

my runnig gallery was hacked but i couldn't find anything to solve that problem so i decided to reinstall it in another directory

the installation runnes fine till point 8 (install core) after a while the browser says done but i can see a button for the next step till i click on the link "installing the core" then i can continue. then it finishes fine but when i click to see my gallery all i see is ERROR

the link to it is www.buchli.co.uk/myfotos

Gallery version (not just "2"): 2.3, gallery-2.3-full-en.zip
PHP version (e.g. 5.1.6): PHP Version 4.3.11
PHPInfo Link (see FAQ):
Webserver (e.g. Apache 1.3.33):
Database (e.g. MySql 5.0.32): 5.0.45
Activated toolkits (e.g. NetPbm, GD): GD
Operating system (e.g. Linux): Linux
Browser (e.g. Firefox 2.0): firefox 3