how show the last active thread in top of "Recent Forum's Thread" list?

[avitor]

hi
the "Recent Forum's Thread" widget shows the latest threads add in forums.
and newest thread's show in top of the widget list.
in my "Recent Forum's Thread" shows 6 latest thread's
how i can make the widget to show last active thread in top of the widget ?.
fore example
if user replay to old thread in forum to jump this thread to top of the "Recent Forum's Thread" ?
thanks