setcookie isn't working

[drewlink]

I'm running into a problem when I try and implement cookie based logins (so people can stay logged in after they close their browser blah blah blah). I'm probably just making a newb problem here, but I have chopped down my code to the following, but it keeps giving me an error when i do "setcookie". Any suggestions on how to fix this? I really appreciate it guys, thanks!

<?
//check to see if the cookie is set
$cookiename = $_COOKIE['duser'];
$cookiepassword = $COOKIE['dpass'];
if(isset($cookiename)){
echo "Welcome $cookiename";
exit();
}
//do this after the login is pressed
if (isset($login)){
echo "You put in $formUser for your username <br>";
echo "You put in $formPass for your password <br>";
setcookie ('duser', $formUser,time()+3600, '/','drewlink.com') or exit("could not set cookie");
setcookie ('dpass', $formPass,time()+3600, '/','drewlink.com') or exit("could not set cookie");
echo "Cookies have been set";
}

?><form action="cookie1.php?login=1" method="post">
Username: <input type="text" name="formUser">
<p>Password: <input type="password" name="formPass"></p>
<p><input type="submit" name="submit" value="login"></p>
</form>

[jason]

Any setcookie() calls have to to be made before anything is written to the screen. This is because the cookies are sent in the HTTP headers, which as their name implies, are sent before the portion of the page that your user actually sees. Just make sure your setcookies() all come before any echo() or print() calls, any text that is outside of the <? ... ?>'s, or any thing else that writes directly to the browser, such as fpassthru() or readfile().

--Jason

[drewlink]

Perfect...Thanks Jason!