speakers: Logitech x-540
sound card: Creative SoundBlaster (SB) Audigy SE
OS: Vista x32
5.1 surround sound is not working... Applications and Drivers are fully updated, i have tried uninstalling and re-installing the drivers. When i select 5.1 under the types of speakers in my application, it disables my center speaker, and makes my rear speakers really garbling. When i select 2.1, it gives me EVEN crystal clear quality sound from all the speakers. I have also checked all the connections three times.