When I uploaded all of my files, I can't open the page

[huavyw]

When I uploaded all of my files, I can't open the page:

Fatal error: Call to undefined function _system_theme_data () in / ... / includes / theme.inc on line 439

theme.inc of 437-439:
else (
/ / Scan the installation when the database should not be read.
$ themes = _system_theme_data ();
)

[UnlimitedMB]

This is a bug in your script, nothing to do with us.
http://drupal.org/node/281997

[huavyw]

Thank you reply.

Information is not allowed to po and HTACCESS files.

I would like to start from scratch to install a new drupal, the following message appears:

Fatal error: require_once() [function.require]: Failed opening required './modules/system/system.install' (include_path='.:/usr/local/share/pear') in /hosted/subs/ulmb.com/h/u/.../public_html/install.php on line 26