How do I get on a bug's Cc: list?

[ToddAndMargo]

Hi All,

I would like to get on to this bug's Cc: list:

http://www.virtualbox.org/ticket/1778

I do have an account. And, the top of the window says I am
logged in. But I can not find a place to get on the Cc: list.

What am I missing?

Many thanks,
-T