LuisSoares:
When i compile your sketch, i´m getting an error with the F function.
I did that to save RAM. The messages you get show why.
It indeed was written for version 1.0 of the IDE. I suggest you install that, if only to compile this sketch. You don't have to use it all the time.
The rather wordy messages in the sketch consume RAM unless you keep the "F" macro.
Alternatively there are ways of introducing the F idea into 0022 of the IDE (it's pretty simple) but I don't recall where the instructions are.