You are unfair to the author. This guide worked absolutely fine, and the guide has nothing to do with how much capacity your Acer Aspire One has, it has to do with how to exchange the RAM...
IF you want to fix things like highly compressed technology / like a mini laptop / yourself, you need to be sensitive. The way I have seen 9 out of 10 persons, they do not have that sensitivity. It is not a fault on you, and does not make you wrong. But you must be conscious about if you do not have the necessary sensitivity to do this work.
IFF your pad is not working, then try to do the same operation once more and be aware of how the mini laptop is to be handled at the various parts. I would guess that we are missing a wire in your laptop or something like that.
And - if you want it put in another way - since you couldn\t master doing it - then the money you saved on that RAM exchange - you can now spend them on fixing that small pad problem - with a professional.
I am blaming you for blaming the author.