Paddle collision problems

// --------------------------------------------------------------------
// Setup T2D Scene.
// --------------------------------------------------------------------
function setupT2DScene()
{
	new fxSceneGraph2D(t2dSceneGraph);
	sceneWindow2D.setSceneGraph( t2dSceneGraph );
	sceneWindow2D.setCurrentCameraPosition( "0 0 80 60" );

	// Bouncy Material.
   datablock fxCollisionMaterialDatablock2D(bouncyMaterial)
   {
      friction = 0;
      restitution = 1.0;
      relaxation = 0.5;
      density = 0.01;
      forceScale = 1;
      damping = 0;
   };  
	CreateWalls();
	CreatePlayer();
	CreateBall();
}

function CreatePlayer()
{
	$player = new fxStaticSprite2D() { scenegraph = t2dSceneGraph; };
	$player.setPosition("0 22");
	$player.setSize( "8 2" );
	$player.setImageMap( tileMapImageMap );

	new ActionMap(playerMap);
	playerMap.bindCmd(keyboard, "left", "playerLeft();", "playerLeftStop();");
	playerMap.bindCmd(keyboard, "right", "playerRight();", "playerRightStop();");
	playerMap.push();
	
	$player.setWorldLimit( clamp, "-39 -39 39 39" );
	$player.setGroup( 1 );
	$player.setLayer( 1 );
	$player.setCollisionActive( false, true );
  $player.setCollisionMasks( BIT(1), BIT(1) );
}

function CreateBall()
{
   $ball = new fxStaticSprite2D() { scenegraph = t2dSceneGraph; };
   $ball.setSize( 4 );
   $ball.setImageMap( tileMapImageMap );
   $ball.setCollisionActive( true, false );
   $ball.setCollisionPhysics( true, false );
   $ball.setCollisionMasks( BIT(1), BIT(1) );
   $ball.setCollisionMaterial( bouncyMaterial );
   $ball.setMaxAngularVelocity( 0 );
		$ball.setGroup( 1 );
		$ball.setLayer( 1 );
   // Give it a random direction.
   $ball.setImpulseForcePolar( getRandom()*360, 400 );
}

function playerLeft()
{
	$player.setLinearVelocityX( -25 );
}

function playerLeftStop()
{
	if ( $player.getLinearVelocityX() < 0 )
		$player.setLinearVelocityX( 0 );
}

function playerRight()
{
	$player.setLinearVelocityX( 25 );
}

function playerRightStop()
{
	if ( $player.getLinearVelocityX() > 0 )
		$player.setLinearVelocityX( 0 );
}

function CreateWalls()
{
   // Setup some immovable walls and allow them to receive collisions only...
   
   // Left.
   %sprite = new fxStaticSprite2D() { scenegraph = t2dSceneGraph; };
   %sprite.setPosition( "-40 0" );
   %sprite.setSize( "2 75" );
   %sprite.setImageMap( tileMapImageMap );
   %sprite.setCollisionActive( false, true );
   %sprite.setImmovable();
   %sprite.setGroup( 1 );
	%sprite.setLayer( 1 );
   // Right.
   %sprite = new fxStaticSprite2D() { scenegraph = t2dSceneGraph; };
   %sprite.setPosition( "40 0" );
   %sprite.setSize( "2 75" );
   %sprite.setImageMap( tileMapImageMap );
   %sprite.setCollisionActive( false, true );
   %sprite.setImmovable();
   %sprite.setGroup( 1 );
	%sprite.setLayer( 1 );
   // Top.
   %sprite = new fxStaticSprite2D() { scenegraph = t2dSceneGraph; };
   %sprite.setPosition( "0 -33" );
   %sprite.setSize( "80 2" );
   %sprite.setImageMap( tileMapImageMap );
   %sprite.setCollisionActive( false, true );
   %sprite.setImmovable();
   %sprite.setGroup( 1 );
	%sprite.setLayer( 1 );
   // Bottom.
   %sprite = new fxStaticSprite2D() { scenegraph = t2dSceneGraph; };
   %sprite.setPosition( "0 33" );
   %sprite.setSize( "80 2" );
   %sprite.setImageMap( tileMapImageMap );
   %sprite.setCollisionActive( false, true );
   %sprite.setImmovable();
   %sprite.setGroup( 1 );
	%sprite.setLayer( 1 );
   
}