Not a single arena frame addon working (gladius)

Okay so I have tried every single gladius version on this forum and in the addon-packs + google links. I have tried backpported gladdy, gladiusEx, gladius enhanced.
They all show up in the addon list, but ingame nothing happens. I get "/help bla" when I do /gladius ui or test, or it doesn't let me enter the command at all.
I have tried 6 different downloads of normal gladius - I am going insane. Is it time to download client from another source or what can I do ?