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Collision detection problem in Actionscript 2.0

Hi,

I'm coding an Arkanoid clone in Flash CS3 using AS 2.0 and I can't get the collision detection to work properly. It only works for far right side of the brick wall?!?!

Here is the code:

[code]
class Ball extends MovieClip
{
var xVelocity;
var yVelocity;
var ballLeft;
var ballRight;
var ballUp;
var ballDown;
var wall;

function onLoad()
{
xVelocity = 3;
yVelocity = 3;
ballLeft = 0;
ballRight = 1;
ballUp = 1;
ballDown = 0;
}

function onEnterFrame()
{
var i, j
for(j = 0; j <= 7; j++)
{
for(i = 0; i <= 11; i++)
{
if(this.hitTest(_root.bat.wall[i][j]))
{
_root.bat.wall[i][j].removeMovieClip();
}
}
}

if((_x > 543) and (ballUp == 1) and (ballRight == 1))
{
_x = _x - xVelocity;
ballLeft = 1;
ballRight = 0;
}
else if((ballUp == 1) and (ballRight == 1))
{
_x = _x + xVelocity;
ballRight = 1;
ballLeft = 0;
}
else if((_x > 543) and (ballDown == 1) and (ballRight == 1))
{
_x = _x - xVelocity;
ballLeft = 1;
ballRight = 0;
}
else if((this.hitTest(_root.bat)) and (ballDown == 1) and (ballRight == 1))
{
_x = _x + xVelocity;
ballRight = 1;
ballLeft = 0;
}
else if((this.hitTest(_root.bat)) and (ballDown == 1) and (ballLeft == 1))
{
_x = _x - xVelocity;
ballLeft = 1;
ballRight = 0;
}
else if((_x < 7) and ((ballUp == 1) or (ballDown == 1)) and (ballLeft == 1))
{
_x = _x + xVelocity;
ballLeft = 0;
ballRight = 1;
}
else if((ballDown == 1) and (ballRight == 1))
{
_x = _x + xVelocity;
ballLeft = 0;
ballRight = 1;
}
else if((ballDown == 1) and (ballLeft == 1))
{
_x = _x - xVelocity;
ballLeft = 1;
ballRight = 0;
}
else if((ballUp == 1) and (ballLeft == 1))
{
_x = _x - xVelocity;
ballLeft = 1;
ballRight = 0;
}
else if((ballUp == 1) and (ballRight == 1))
{
_x = _x + xVelocity;
ballLeft = 0;
ballRight = 1;
}
else
{
// do nothing
}


if((_y < 7) and (ballUp == 1) and (ballRight == 1))
{
_y = _y + yVelocity;
ballUp = 0;
ballDown = 1;
}
else if((ballUp == 1) and (ballRight == 1))
{
_y = _y - yVelocity;
ballUp = 1;
ballDown = 0;
}
else if((_x > 543) and (ballDown == 1) and (ballRight == 1))
{
_y = _y + yVelocity;
ballDown = 1;
ballUp = 0;
}
else if((this.hitTest(_root.bat)) and (ballDown == 1) and ((ballRight == 1) or (ballLeft == 1)))
{
_y = _y - yVelocity;
ballUp = 1;
ballDown = 0;
}
else if((ballDown == 1) and (ballRight == 1))
{
_y = _y + yVelocity;
ballDown = 1;
ballUp = 0;
}
else if((ballDown == 1) and (ballLeft == 1))
{
_y = _y + yVelocity;
ballDown = 1;
ballUp = 0;
}
else if((_y < 7) and ((ballUp == 1) or (ballDown == 1)) and (ballLeft == 1))
{
_y = _y + yVelocity;
ballDown = 1;
ballUp = 0;
}
else if((ballUp == 1) and (ballLeft == 1))
{
_y = _y - yVelocity;
ballUp = 1;
ballDown = 0;
}
else if((ballUp == 1) and (ballRight == 1))
{
_y = _y - yVelocity;
ballUp = 1;
ballDown = 0;
}
else
{
// do nothing
}
}

}
[/code]

[code]
class Bat extends MovieClip
{
var xPos = 25;
var yPos = 50;
var wall;

function onLoad()
{
var sB = new Array(0, 0, 0, 0, 0, 0, 0, 0);
wall = new Array(sB, sB, sB, sB, sB, sB, sB, sB, sB, sB, sB, sB)

for(var x = 0; x <= 11; x++)
{
for(var y = 0; y <= 7; y++)
{
wall[x][y] = _root.attachMovie("Brick", "Brick" + _root.getNextHighestDepth(), _root.getNextHighestDepth(), {_x: xPos, _y: yPos});
yPos = yPos + 25;
}
xPos = xPos + 45;
yPos = 50;
}
}

/*
function buildWallX(xPos)
{
for(var i = 1; i < 4; i++)
{
var buildWall = _root.attachMovie("Brick", "Brick" + _root.getNextHighestDepth(), _root.getNextHighestDepth(), {_x: xPos, _y: yPos});
wall.push(buildWall);
xPos = xPos + 45;
}
}
*/

function onEnterFrame()
{
if(Key.isDown(Key.LEFT))
{
if(_x < 49.5)
{
// do nothing
}
else
{
_x = _x - 10;
}
}

if(Key.isDown(Key.RIGHT))
{
if(_x > 500.5)
{
// do nothing
}
else
{
_x = _x + 10;
}
}
}
}
[/code]

Thanks.
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