Free/busy information not being displayed

We are running Ex2k3 with SP2 and Outlook 2003 with SP3. At this point, I have two calendars that I know of that do not display Free/busy information when users try to create a meeting. One is a conference room and the is a group calendar in a Public Folder. I have ran /cleanfreebusy with no success. I have played with permissions and freebusy settings. I’m not sure where else to go. It doesn’t seem to matter which server (we run two back-end exchange servers) users are on. Any ideas?