I'm running XP Pro with a SBLive! Platinum card & Klipsch Promedia 4.1 speaker setup. Everytime I restart my system I must go into the Sounds & Audio Devices portion of Control Panel & change the speaker settings from the current selection (quad) & then back again in order to get audio from the rear pair of speakers. SB setting is for 4 speakers & it is not necessary to change it in order to get it working properly. XP & SB all have updates. Has anyone else run into a problem like this?