Fish moves up and down even if i let go of the key

hey guys....this is my player.cs file
i had i working fine earlier in the tutorial but it isnt working anymore and im not sure what i did

///--------------------------------------------------------------------------------------------
///CONTROLS
///--------------------------------------------------------------------------------------------

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();");
moveMap.bindCmd(keyboard, "space", "fishPlayerBoost();", "fishPlayerBoostStop();");

%this.lowerLife();
}



///-----------------------------------------------------------------------------------
///Update Movement Function
///-----------------------------------------------------------------------------------

function PlayerFish::updateMovement(%this)
{
if(%this.dead)
return;

if(%this.moveLeft)
{
$FishPlayer.setFlipX(true);
$FishPlayer.setLinearVelocityX( -$FishPlayer.hSpeed );
}

if(%this.moveRight)
{
$FishPlayer.setFlipX(false);
$FishPlayer.setLinearVelocityX( $FishPlayer.hSpeed );
}

if(%this.moveUp)
{
%this.setLinearVelocityY( -$FishPlayer.vSpeed );
}


if(%this.moveDown)
{
%this.setLinearVelocityY( $FishPlayer.vSpeed );
}


if(!%this.moveLeft && !%this.moveRight)
{
%this.setLinearVelocityX( 0 );
}


if(!%this.moveUp && !%this.moveDown)
{
%this.setLinearVelocityYt2dSceneObject::setLinearVelocityY(float velocityY)( 0 );
}
}


///--------------------------------------------------------------------------------------
///Modify Life Function
///--------------------------------------------------------------------------------------

function PlayerFish::modifyLife(%this, %dmg)
{
%this.life += %dmg;


if(%this.life > 100)
{
%this.life = 100;
} else if (%this.life < 0)
{
%this.life = 0;
}


if(%this.life <= 30)
{
%this.dead();
} else
{
%this.updateLifeSize();
}
}


///---------------------------------------------------------------------------
///Life Size Function
///---------------------------------------------------------------------------

function PlayerFish::updateLifeSize(%this)
{
%lifeMultiplier = %this.life / 100;


%newWidth = %this.maxWidth * %lifeMultiplier;
%newHeight = %this.maxHeight * %lifeMultiplier;

%this.setSize(%newWidth, %newHeight);
}



///----------------------------------------------------------------------------
///Dead Function
///----------------------------------------------------------------------------

function PlayerFish::dead(%this)
{
%this.setFlipY(true);
%this.setLinearVelocityY(-10);
%this.dead = true;
}



///--------------------------------------------------------------------------------
///Lower Life Function
///--------------------------------------------------------------------------------

function PlayerFish::lowerLife(%this)
{
%this.modifyLife(%this.lifeDrain);

if(!%this.dead)
{
%this.schedule(500, "lowerLife");
}
}




///-----------------------------------------------------------------------------------------
///Fish Stop Function
///-----------------------------------------------------------------------------------------

function fishPlayerUpStop()
{
$FishPlayer.moveUp = false;
$FishPlayer.updateMovement();
}


function fishPlayerDownStop()
{
$FishPlayer.moveDown = false;
$FishPlayer.updateMovement();
}

function fishPlayerLeftStop()
{
$FishPlayer.moveLeft = false;
$FishPlayer.updateMovement();
}


function fishPlayerRightStop()
{
$FishPlayer.moveRight = false;
$FishPlayer.updateMovement();
}



///---------------------------------------------------------------------------------
///Fish Move Funtion
///---------------------------------------------------------------------------------

function fishPlayerUp()
{
$FishPlayer.moveUp = true;
$FishPlayer.updateMovement();
}


function fishPlayerDown()
{
$FishPlayer.moveDown = true;
$FishPlayer.updateMovement();
}


function fishPlayerLeft()
{
$FishPlayer.moveLeft = true;
$FishPlayer.updateMovement();
}


function fishPlayerRight()
{
$FishPlayer.moveRight = true;
$FishPlayer.updateMovement();
}


///-----------------------------------------------------------------------
///Fish Boost Function
///-----------------------------------------------------------------------

function fishPlayerBoost()
{
if($FishPlayer.dead)
return;


%flipX = $FishPlayer.getFlipX();



if(!%flipX)
{
%hSpeed = $FishPlayer.hSpeed * 3;
} else
{
%hSpeed = -$FishPlayer.hSpeed * 3;
}


$FishPlayer.setLinearVelocityX(%hSpeed);
}

///--------------------------------------------------------------------
///Fish BoostStop Function
///--------------------------------------------------------------------

function fishPlayerBoostStop()
{
$FishPlayer.setLinearVelocityX(0);
}