I connected Sony DVD NC685V to 950 using an optical connection (opt1). I also connected multi-channel output to 950. But 950 decodes DVDs in 2-channel mode even though the DVDs are encoded in Dolby Digital (e.g., Friends, Seinfeld, Frasier, etc.). The same DVDs play correctly in my laptop DVD player. Tried different discs but always get 2-channel decoding. Any suggestions on what's wrong with this set up?

Thanks.
tihzho