Magento 404 Admin Page Login -

i getting 404 error when trying go admin page working fine earlier today. haven't changed since last logged in , thing doing assigning products categories.

http://mytempsite.net/gotie/admin

what ive tried far
delete following file:-

app/etc/use_cache.ser <-- i not find file in ftp or ssh

then tried doing opened phpmyadmin
- went database
- clicked sql
- ran following sql query:

set foreign_key_checks=0;
update core_store set store_id = 0 code='admin';
update core_store_group set group_id = 0 name='default';
update core_website set website_id = 0 code='admin';
update customer_group set customer_group_id = 0 customer_group_code='not logged in';
set foreign_key_checks=1;

the problem in getting of request_uri environment variable value , checking withscript_filename , script_name environment variables values.

so cause of problem in adding of /index.php/ prefix request path , magento url generation has value hardcoded admin.

override method called _updatepathuserewrites in /app/code/core/mage/core/mode/store.php file : replace function:

protected function _updatepathuserewrites($url) { if ($this->isadmin()    || !$this->getconfig(self::xml_path_use_rewrites) || !mage::isinstalled()) { $url .= basename($_server['script_filename']).'/';        } return $url; } 

with

    protected function _updatepathuserewrites($url) { if ($this->isadmin()    || !$this->getconfig(self::xml_path_use_rewrites) || !mage::isinstalled()) { $url .= '/';        } return $url; } 

this solve problem