Only move backwards

I'm just trying to build a little demo like chapter 4 of the ken finney book (except i'l have a different camera and use the left/right keys to "steer" rather than strafe).
Anyway, for some reason the player can only move backwards. I Know the move functions are getting called cos of the echo statements in them.
Does anyone have any idea whats going on?

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//control/client.cs

if (isObject(playerKeymap))
playerKeyMap.delete();
new actionMap(playerKeymap);

$movementSpeed = 1;

new GameTSCtrl(playerInterface)
{
profile = "GuiContentProfile";
noCursor = "1";
};

function playerInterface::onWake(%this)
{
$enableDirectInput = "1";
activateDirectInput();

playerKeymap.push();
}

function GameConnection::InitialControlSet(%this)
{
canvas.setContent(PlayerInterface);
}

function goFoward(%val)
{
echo("going foward " @ %val);
$mvFowardAction = %val;
}

function goBackward(%val)
{
echo("going backward " @ %val);
$mvBackwardAction = %val;
}

function leftTurn(%val)
{
echo("turning left " @ %val);
$turnLeft = %val;
}

function rightTurn(%val)
{
echo("turning right " @ %val);
$turnRight = %val;
}

function doYaw(%val)
{
$mvYaw += %val * ($cameraFOV / 90) * 0.02;
}

function doPitch(%val)
{
$mvPitch += %val * ($cameraFOV / 90) * 0.02;
}

function toggle1stPPOV(%val)
{
if(%val)
{
$firstPerson = !$firstPerson;
}
}


playerKeymap.bind(keyboard, up, goFoward);
playerKeymap.bind(keyboard, down, goBackward);
playerKeymap.bind(keyboard, left, leftTurn);
playerKeymap.bind(keyboard, right, rightTurn);
playerKeymap.bins(keyboard, z, dropCam);
playerKeymap.bind(mouse, xaxis, doYaw);
playerKeymap.bind(mouse, yaxis, doPitch);
playerKeymap.bind(keyboard, tab, toggle1stPPOV);

globalActionmap.BindCmd(keyboard, escape, "", "quit();");
globalActionmap.bind(keyboard, tilde, ToggleConsole);

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