Any idea how to safly open a chat tap?

[epsilon2]

I have the following basis:

function closeChannel(name)
--modules.game_console.removeTab(name)
--modules.game_console.addTab(name)
g_game.joinChannel( getChannelId(name))
--modules.game_console.addChannel(tr(name), 98)
end

closeChannel("Events")
closeChannel("Trade")

Mostly i get an tap but no text from server.

How to change this ?