João... from what stage to what stage is the checklist not working for you?

If you are talking about the after start, pre takoff.... make sure you are not aggressive with the throttles while taxing. The script (checklist) will stop working. If you are not moving the throttles all the way forward on the take-off role, that will cause the script (checklist) to stop working as well.

There are other things that will stop the checklist from working as well but these are the only two that I have had trouble with. Anyone else care to add to the list?

Murray Wheten

I,ve found that you need to hit the shift - ~ keys to start the checks and then again after each check to move on to the next.
For example after prestart checks and the engine is running, hit the keys again and the after start checks will begin,
then again to start the taxi check and so on.
Hope that helps

Cheers