Ok i've followed the upgrade instructions and now I can't do anything. I get the following error in my php log.

PHP Parse error: syntax error, unexpected '<' in \\TRINITY-PRIM1\G\Users\cPanel\tbltax\public_html\gallery\zp-core\setup.php(225) : eval()'d code on line 3
PHP Notice: Undefined index: mysql_database in \\TRINITY-PRIM1\G\Users\cPanel\tbltax\public_html\gallery\zp-core\functions-db-MySQL.php on line 21
PHP Parse error: syntax error, unexpected '<' in \\TRINITY-PRIM1\G\Users\cPanel\tbltax\public_html\gallery\zp-core\setup.php(625) : eval()'d code on line 3

Can anyone help?

Please post basic infos. What version did you upgrade from? Did setup report anything and if what? Server configuration? Where does the error appear?

maybe this can be helpful for you : http://www.zenphoto.org/support/topic.php?id=11315