Turtle Program Not Working in 1.4 Update

I created my first real program for a mining turtle (back when they had 9 slots)

Now when I run it in the 1.4 update (turtles have 16 slots) it just spins in a circle

Whats wrong?

function dig()
  turtle.turnLeft()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.up()
  turtle.digUp()
  turtle.up()
  turtle.turnRight()
  turtle.turnRight()
  turtle.dig()
  turtle.forward()
  turtle.digDown()
  turtle.dig()
  turtle.forward()
  turtle.digDown()
  turtle.down()
  turtle.digDown()
  turtle.down()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnRight()
end
function moveForward()
  turtle.select(2)
  turtle.dig()
  turtle.forward()
  if turtle.detectDown() == false then
  turtle.placeDown()
  end
end
function placeTorch()
  turtle.select(1)
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.place()
  turtle.turnRight()
  turtle.turnRight()
end
term.clear()
term.setCursorPos(1, 1)
print("How Far Should I Dig?")
numberToMine = tonumber(read())
counter = 0
torchCounter = 0
textutils.slowPrint("Please Put 20 Torches in My Top Left Slot")
while turtle.getItemCount(1) < 20 do
	sleep(5)
print("Please Insert " .. 20 - turtle.getItemCount(1) .. " more torches")
end
term.clear()
term.setCursorPos(1, 1)
textutils.slowPrint("Now Tunneling")

while counter < numberToMine do
  if torchCounter == 10 then
	placeTorch()
torchCounter = 0
  end
  moveForward()
  dig()
  counter = counter + 1
  torchCounter = torchCounter + 1
end
print("Mined Tunnel " .. numberToMine .. " Block(s) Long")

Turtles need fuel to move. Put coal in the current slot and type 'refuel', or call turtle.refuel()

and if you opt for the code way add a function into the code that uses

turtle.getFuelLevel()

which returns the number of blocks the turtle can move. also notable is if the turtle cannot move, it can be; 1. Block in its way ( use turtle.dig() ), 2. Mob in its way ( use turtle.attack() ) or 3. out of fuel ( write a fuel checking function )

Thanks guys I can't believe I missed that