Dynamic texts like username & computer name in the event message texts

I am using WinCC v6.2 for my project. I want to include dynamic texts like username or computername in the event messages. I have attached the file so that you can understand how the alarm control window should look like in runtime. Here the "Vaitk:" is the operator who is making some operation from HMI. Similarly it should also reflect which operator is acknowledging alarm messages from HMI.

Following things I have already tried ..but it is not working.

1) In the event class properties->acknowledgement tab "Comments assigned to the unique user" and "Comments always in the mesage list of the incoming message" checkboxes have been checked.
2) In the Message blocks-> System blocks, username block have been selected.
3) In the "WinCC message text" field of the Alarm Logging Table window the messages are written like "@102%s@: hyd prs pump 01 rem sel". The @102%sis for the user name and rest is the event message.
4) In the CCAlgWinCtrl-> message block tab the the username checkbox have been selected.


During runtime I get the event messages except the dynamic text i.e the username. The message displayed is ": hyd prs pump 01 rem sel".

Pls check the attached file for the settings I have made.