Need Help With UltraRP Registering

i need help with fixing my RP Registering it is saying
Notice: Undefined variable: page in C:\xampp\htdocs\includes\core.php on line 21

Notice: Undefined variable: page in C:\xampp\htdocs\includes\core.php on line 25

Notice: Undefined variable: page in C:\xampp\htdocs\includes\core.php on line 48

Notice: Undefined indexhttp://cdncache1-a.akamaihd.net/item...rrow-10x10.png: user in C:\xampp\htdocs\includes\core.php on line 48

Notice: Undefined indexhttp://cdncache1-a.akamaihd.net/item...rrow-10x10.png: y in C:\xampp\htdocs\includes\functions.php on line 33

Notice: Undefined variable: page in C:\xampp\htdocs\includes\core.php on line 50

Notice: Undefined indexhttp://cdncache1-a.akamaihd.net/item...rrow-10x10.png: rememberme in C:\xampp\htdocs\includes\core.php on line 50

Fatal error: Call to undefined function session_is_registered() in C:\xampp\htdocs\register.php on line 28

If you know how to fix this please tell me on fb
Add me on fb https://www.facebook.com/luke.mihalyfi
-luke

First of all this isn't the help section, can a mod move this thread to the help section.
Have you edited the config?

yes i have

What web server are you running?

I have the feeling you are running on IIS and the php code is incorrect as IIS throws a error when you do $_GET['page'] even though the parameter 'page' doesnt exist in the url.