Install error Admin page Warning: array_keys():

Hello everyone I am on my first install after long searching and be hacked by santy on my phpbb2 I tried this every thing worked ok but on the top of my ad min page this is displayed and it will not let me do anything up there…

Warning: array_keys(): The first argument should be an array in /www/i/infomatrix/htdocs/wp-admin/admin-functions.php on line 753

Warning: Invalid argument supplied for foreach() in /www/i/infomatrix/htdocs/wp-admin/admin-functions.php on line 753

Warning: Invalid argument supplied for foreach() in
/www/i/infomatrix/htdocs/wp-admin/menu-header.php on line 8

this is the line…

}foreach (array_keys($submenu) as $parent) {
foreach ($submenu[$parent] as $submenu_array) {
if ($submenu_array[2] == $pagenow) {
$parent_file = $parent;
return $parent;
} else if (isset($plugin_page) && ($plugin_page == $submenu_array[2])) {
$parent_file = $parent;
return $parent;
}

Thanks
Vis.
just tring to get working can not yet