need some serious help pls ?

[ubunreal69]

I have been workinh on the shell of this page for some time now, bits and pieces, i finally got the login script to work while substitutin the cookie aloocations with text being displayed that shoed whether you would have been logged in or not. anyway, i replaced this text with the code to assign a cookie, and all of a sudden it didnt work. i spent five and a half hours trying to geet it to work, and now, the next day it is still troubling me, can someone pleeeeeeze help me ?

some extra info: when i just type in the code to assign the cookie on the main index (Index.php) page, it works fine and displays the user specified as being logged in, but when i run a script on a seperate page (Includes/do_log.php) then when i go back to the main page it isnt there. logouts used to work but now have stopped.

any questions ort anything, feel free to post them

I'v also included a ZIP containing the entire web system (pages).