Need help with "Jump" plugin!

So this will work fine, but it wont work if it should "jump" you in to north. Other ways it works fine.

Here's some code:

Code:java

    @EventHandler
      public void onPlayerMove(PlayerMoveEvent event)
      {
        Player player = event.getPlayer();
        Location standBlock = player.getWorld()
          .getBlockAt(player.getLocation().add(0.0D, -0.01D, 0.0D))
          .getLocation();
        if (standBlock.getBlock().getTypeId() == 86)
        {
          int xblock = 0;
          double xvel = 0.0D;
          int yblock = -1;
          double yvel = 0.0D;
          int zblock = 0;
          double zvel = 0.0D;
          while (standBlock.getBlock().getLocation()
            .add(xblock - 1, -1.0D, 0.0D).getBlock().getTypeId() == 35)
          {
            xblock--;
            xvel += 1.0D;
          }
          while (standBlock.getBlock().getLocation().add(0.0D, yblock, 0.0D)
            .getBlock().getTypeId() == 35)
          {
            yblock--;
            yvel += 0.7D;
          }
          while (standBlock.getBlock().getLocation()
            .add(0.0D, -1.0D, zblock - 1).getBlock().getTypeId() == 35)
          {
            zblock--;
            zvel += 1.0D;
          }
          xblock = 0;
          zblock = 0;
          while (standBlock.getBlock().getLocation()
            .add(xblock + 1, -1.0D, 0.0D).getBlock().getTypeId() == 35)
          {
            xblock++;
            xvel -= 1.0D;
          }
          while (standBlock.getBlock().getLocation()
            .add(0.0D, -1.0D, zblock + 1).getBlock().getTypeId() == 86)
          {
            zblock++;
            zvel -= 1.0D;
          }
          if (((player.hasPermission("jump.launch")) && (
            (xvel != 0.0D) || (yvel != 0.0D) || (zvel != 0.0D))))
          {
            player.setVelocity(new Vector(xvel, yvel, zvel));
            if (player.hasPermission("jump.launch")) {
              player.playSound(player.getLocation(),
                Sound.WITHER_SHOOT, 1.0F, -5.0F);
            }
          }
        }
      }