Tree Mining Program

Hey guys! I'm a brand new user of ComputerCraft and I need some help. I created a program to mine tree's but it doesn't seem to be working. I'll put a link to a video I made of the program and a copy of the program itself. Thanks so much for your help!

Here is the video link: http://www.youtube.com/watch?v=xZ9IcgkAbps

And the code:
while not turtle.detectUp() do
turtle.dig()
turtle.up()
end

while turtle.detectUp() do
turtle.digUp()
turtle.up()
end

while not turtle.compareTo(1) do
turtle.down()
end

while turtle.compareTO(1) do
turtle.dig()
turtle.down()
end


Thanks for all your help!!

turtle.compareTo(slot) between the item in the current slot and the item in the specified slot. You may want use turtle.compare() instead. (http://computercraft...urtle_%28API%29)