Sessions not being set?

[SDP2006]

I'm using MySQL and Sessions for my login system. The MySQL part of the login is fine, but for some reason my sessions wont set.

Here is my code

    function login($username,$password){
        $this->username = $username;
        $this->password = $password;
        $this->connect();
        $query = "SELECT id,user,pass FROM blogusers WHERE user='{$this->username}' AND pass='{$this->password}'";
        $result = mysql_query($query) or die(mysql_error());
        if(mysql_num_rows($result) == "0"){
            echo "Wrong username and/or password";
        }
        else{
            session_start();
            $_SESSION['username'] = $this->username;
            $_SESSION['password'] = $this->password;
            Header("Location: base.php?mode=cp");
        }
    } 

So, when I check to see if the session is established by

if(isset($_SESSION['username']) && isset($_SESSION['password'])) 

It returns false, because it does not redirect to the control panel and prompts to login.

Any ideas?

Thanks

[raf]

Try renaming the sessionvariables. Like

$_SESSION['xxxuser'] = $username;
$_SESSION['xxxpass'] = $password;

i've noticed on some machines (probably due to register_globals=on ) that if you use the same name for a sessionvar then for a regular var in your script, that the value isn't set, so i now always use unique varnames (even across collections)

[SDP2006]

Hmm. That doesn't seem to work either.

[raf]

do you have a session_start() before the if(isset($_SESSION['username']) && isset($_SESSION['password']))

[SDP2006]

I think that was it. My server is acting screwy right now. I'll confirm it later.

Thanks