I need help here

[tartou2]

i have figured that by myself like an hour ago but i am facing troubles when removing the cookies.
The fonction isn't working.

PHP Code:

$expirecookie=time()-3600;
setcookie('loginusername', "", $expirecookie); 


what i am doing wrong?

And the server i am hosting my website still works with php v5

EDIT: Don't worry i don't have to remove the cookies

thank for your help. At least you are the only one that gave the right solution