One program, different behaviour

Hello everyone,

I just started getting into computer craft with now prior programming experience, so be gentle. :D/>
So here's my problem: I wrote this program http://pastebin.com/mdfCGejT for a task to fill in a huge water put. I have turtle1, on which I wrote and tested the program. On turtle1 the program makes it go 1 block forward, then down the amount of specified blocks in "height" and then up again while placing blocks. Then it repeats. All fine.
I then uploaded the program to pastebin and downloaded it to other turtles. These other turtles, however, just break and place blocks underneath them. Doing nothing else. I have uploaded and re-downloaded the program 3 times now. I once even deleted it from turtle1 and re-downloaded it again. Still, the program behaves on turtle1 but not any other turtle.

Any ideas how that came to be?

Thanks :)/>

Do your turtles have fuel? If they don't have fuel, they can't move (but can still dig, turn, etc.)

Oh my, you are correct. I didn't fuel them up :<. Wow, that's embarrassing :|

Thank you for your help :)/>