Sametime STLinks does not show awareness when Sametime server is configured for tunneling on Port 80.
Two fixes are documented on forums. (I implemented the 1st successfully, so have not tried the second one.)
Option 1: Update the sametime.ini
Edit the (local/notesdata) sametime.ini with notepad and add the following section:
Option 2: Update hostinfo.js
Edit the (local/notesdata/domino/html/sametime/stlinks) hostInfo.js with notepad and add/update the following:
var TUNNELING_ADDRESS = "";