Single post in Site Skins: How-To, and Helpful CSS

So... I wanted to add the field clicking Modification (the first code) but it doesn't work :/ The code is not touching another one (I always press enter at least 2/3 times between each code). I'm using Chrome and cleared my cache more than one time but it just doesn't work... I even tried other similar codes but same thing, any code I tried to massclick fields easily are not working u_u I also tried one to massclick parties but nope, doesn't work either ! What am I doing wrong ? :c