IM Gateway - ICQ - simple question

Hello,

I have just one simple question:

What is the correct format adress of ICQ gateway for sending messages throught SMACK API.

typically: xmppManager.sendMessage(message_body, ICQ_adress);

ICQ_adress=???

(I tried something like 451646446@icq.my_server.com but it doesn´t work, where 451646446 is my ICQ registered account of Gateway.

Thank you very much.

Pavel