I just bought an APC Back-UPS 1100 Pro and when running Powerchute I noticed it won't allow me to run smart signalling. I found some documentation online that stated the Back-UPS only supports simple signaling, but the Back UPS- PRO can in fact support smart signalling. I can't get it to work with Smart Signaling, I'm wondering if it's a Windoze XP problem with the Powerchute software, or if I need to buy a special smart signaling cable to make it work.