Can not login admin site

Check the version of php on your hosting site.

Also check to see if it is case sensitive.

yes, version on hosting php 5.6, and I also using php 5.6 in my localhost

@stupidpro,

You might need to also verify that the configuration files are set up correctly.

I see session not working, perhaps.
I set session index file
session_start();

if (isset($_REQUEST["PHPSESSID"]))
{
    session_id($_REQUEST["PHPSESSID"]);
    setcookie("PHPSESSID", $_REQUEST["PHPSESSID"], 0, "/");
}