Having trouble displaying variables. [SOLVED]

[machinist]

Basically i store their username when they log in and want their control panel to say Hello welcome back [username goes here].

But for some reason i can't get it to work.
This is the code i am using.
(To see if the have logged in i use a variable).

<?
If ($_SESSION[login]=1){
print($_SESSION[user]);
} else {
echo 'Not logged in';
}
?>

Before you ask me to check the variable, if i use this code it returns the message (Welcome back Scott).

<?
If ($_SESSION[user]=Scott){
print('Welcome back Scott');
} else {
echo 'Not logged in as Scott';
}
?>

Any help would be appreciated.