my item changes aren't working

[Unkown Kokiri]

okay i have the common 3 and the file in the proper spot on my sd card but for some odd reason nothing showing up when they are changed example i changed the ray gun into the cod raygun it never showed

[Tryst]

where are you putting them and What common 3 pac did you get so i can check it for you? One last thing. Riivolution or not? If you use Riivolution i cant help. D=

[Unkown Kokiri]

riivolution and the common3 file im using is from the video by this guy
Brawl Modding Tutorial: Items