2d demo fish problem

I have been playing around with the 2d game builder demo and can't get my fish to move down.

All other keys work but the "s". i even tried binding it to a differnt key. But nothing. Any suggestions?

Here is the code:

function PlayerFish::onLevelLoaded(%this,%scenegraph) {

$FishPlayer = %this;

moveMap.bindCmd(keyboard, "w", "fishPlayerUp();", "fishPlayerUpStop();");
moveMap.bindCmd(keyboard, "s", "fishPlayerDown();", "fishPlayerDownStop();");
moveMap.bindCmd(keyboard, "a", "fishPlayerLeft();", "fishPlayerLeftStop();");
moveMap.bindCmd(keyboard, "d", "fishPlayerRight();", "fishPlayerRightStop();");
}

// Move
function fishPlayerUp() {
$FishPlayer.setLinearVelocityY (-15);
}
function fishPlayerDown(){
FishPlayer.setLinearVelocityY (30);
}
function fishPlayerLeft() {
$FishPlayer.setLinearVelocityX (-30);
}
function fishPlayerRight() {
$FishPlayer.setLinearVelocityX (30);
}



// Stop
function fishPlayerUpStop() {
$FishPlayer.setLinearVelocityY {0);
}
function fishPlayerDownStop() {
$FishPlayer.setLinearVelocityY (0);
}
function fishPlayerLeftStop() {
$FishPlayer.setLinearVelocityX (0 );
}
function fishPlayerRightStop() {
$FishPlayer.setLinearVelocityX (0 );
}