help with my first plugin...

so ive been trying to write my first plugin today and i seem to have hit a roadblock,
basically im trying to implement something like degreifstick only it takes out a line of blocks (inspired by blastpick from hmod) anyways i have this as my onrightclick event but it doesnt seem to work... does anyone who has had more than a days experience see a problem?

Code:

    public void onBlockRightClick(BlockRightClickEvent event){
        System.out.println("OMFG IT WORKED!!");
        int length = plugin.getLength();
        if(event.getItemInHand().getType() == Material.DIAMOND_PICKAXE){
            Player player = event.getPlayer();
            Block[] blocks = new Block[length];
            blocks[0] = event.getBlock();
            World world = blocks[0].getWorld();
            Vector playerLocation = player.getLocation().toVector();
            Vector blockLocation = blocks[0].getLocation().toVector();
            double dx = blockLocation.getX() - playerLocation.getX();
            double dy = blockLocation.getY() - playerLocation.getY();
            if(Math.abs(dx) > Math.abs(dy)){
                for(int i = 0; i < length - 1 ; i++ ){
                    blockLocation = blocks[i].getLocation().toVector();
                    blocks[i+1] =  world.getBlockAt((int)(blockLocation.getX() + Math.signum(dx)),  (int)(blockLocation.getY()), (int)(blockLocation.getZ()));
                }
            }else{
                for(int i = 0; i < length - 1 ; i++ ){
                    blockLocation = blocks[i].getLocation().toVector();
                    blocks[i+1] =  world.getBlockAt((int)(blockLocation.getX()), (int)(blockLocation.getY()  + Math.signum(dy)), (int)(blockLocation.getZ()));
                }
            }
            for(int i = 0; i< length; i++){
                blocks[i].setType(Material.AIR);
            }
        }
    }

Thanks in advance,
MasterCtrl

DW sorted it...

EDIT by Moderator: merged posts, please use the edit button instead of double posting.