Issue with CHAT_MSG_ADDON

[MinguasBeef]

On the TBC beta, it seems like sending addon messages isn't working properly.

I might be just doing something wrong.

When I am sending the addon chat msg, I am triggering my event. When my party member sends it, the event is not triggered.

Here is the code for my frame.

local function CHAT_MSG_ADDON_CALLBACK(prefix, msg, type, sender)
    print("Chat message addon callback triggered!")
    print("prefix: " .. prefix)
    print("msg: " .. msg)
    print("type: " .. type)
    print("sender: " .. sender)
end

local function FrameEventCallback(event, ...)
    if (event == "CHAT_MSG_ADDON") then
        CHAT_MSG_ADDON_CALLBACK(...)
    end
end

local f = CreateFrame("Frame")
f:SetScript("OnEvent", 
function(self, event, ...)
    FrameEventCallback(event, ...)
end)

f:RegisterEvent("CHAT_MSG_ADDON")

Here is the code being used to trigger the event.

/run C_ChatInfo.SendAddonMessage("TEST EVENT", "Some Value")

When I run it, I see the message in chat just like i'd expect. When my party member runs it, I see nothing.

Any ideas?