Second SQL Statement not excecuting

I'm trying to add a player as well as give him a few stats.

But the problem is 1. Doesn't add the stats, 2. I need the gamer added first so I can get the gamerId returned.

    $sqlPlayer = "INSERT INTO players (`gender`, `username`, `email`, `password`) VALUES('$gender','$username','$email','$password')";

    echo $sqlPlayer."</br>";



    if ($db->query($sqlPlayer))

    {

        echo "Player added. </br>";



        $GamerId = $db -> lastInsertId();

        echo "Gamer id added:".$GamerId." </br>";



        $_SESSION['GamerId'] = $GamerId;

        echo "Gamer session added:".$_SESSION['GamerId']." </br>";



        $sqlStats = "INSERT INTO stats (`GamerId`,`Health`,`Stamina`,`Food`,`Coins`,`SuperCoin`) VALUES(`$GamerId`,`100`,`250`,`4`,`500`,`0`)";

        echo $sqlStats."</br>";



        if ($db->query($sqlStats))

        {

            echo "Stats for player added.</br>";

            return true;

        }

    }

    else

    {

        return false;

    }

As seen above I've added a few echo's to see what works and what doesn't to have a visual on what is happening.

So far I always get:

INSERT INTO players (`gender`, `username`, `email`, `password`) VALUES('*gender*','*username*','*email*','*password*')



Player added.



Gamer id added:25 



Gamer session added:25



INSERT INTO stats (`GamerId`,`Health`,`Stamina`,`Food`,`Coins`,`SuperCoin`) VALUES(`7`,`100`,`250`,`4`,`500`,`0`)

,,,, have a standard value in the database and because of this I've also tried:

INSERT INTO stats (`GamerId`,`Health`,`Stamina`,`Food`,`Coins`,`SuperCoin`) VALUES(`25`,` `,` `,` `,` `,` `)



INSERT INTO stats (`GamerId`) VALUES(`25`)