I just recieved this system for Christmas. I am new to this, and the instruction manual for it was not very detailed. It says it has the capability to process the sound in 5.1 Dolby Digital, if you buy a coaxial or optical cable. I have the optical cable and hooked it up but the icon where it tells you what surround mdoe your in will no go to digital. The only one I get is Dolby Prologic II. If anyone has this sysem or can help me with my problem please do. Also the indicator that shows the speaker being used never has the surround and subwoofer speakers lit like they are not being used yet I can hear sound coming from them. Please help!