Online Chat Problem -- Please Help me

[Racetrack]

I have this problem: While I'm online I can't see the Chat staying in the screen, I actually CAN write message and other players CAN read MY messages...
But I can't see the chat so is impossible to me to see any message of server or other players...
I do this : Press "chat" key, write message, select radio and press "Enter" to send message... And it work fine...
I can't find any command in the "Controls" section of the game that can toggle chat..
What I have to do to see the chat staying always on screen?
Thank you guys!