@brazzerstop The pagination value you set in the acp effects new users, each user can override that value in their user settings. Go into your user settings and set it to 30 and try again.
@힙찔이닷컴 You should elaborate a bit more here and provide at least an error message - or better still, a detailed overview of what isn't working, or what results you got instead of what you expected.
Does it work fine here? 
