Yes, the DSOTM SACD disk has multi-channel on it. I understand their are
several "pressing" versions of it from different plants but I don't know
how
to tell them apart. The sound on mine is spectacular in surround.

You may want to make sure you have a SACD disk since the cd and sacd
covers
bear more than a little resemblance. Do you hear a sound difference when
you
play the SACD vs CD layer? Do the lights on the panel continue to say
SACD?

There is a BIG difference between the CD and stereo SACD layers, and yes,
the player continues to show"SACD" when playing the disc

My disk has the SACD logo on the disk itself, along with a Capital Records
logo and a compact disk logo. On the back of the jewel case is bar-coded
2435-82136-2 in the upper right corner, and in fine print in a box lower
right says "this product is a Hybrid SACD designed to play in both CD and
SACD players, as well as SACD-compatible DVD players. The 5.1 SACD
Surround
Sound Mix requires a Mulit-Channel SACD player or compatible surround
sound
system." The spine of the disk has the same number as the barcode,
followed by "-US". If yours matches this description, the disk
definitely
should have the 5.1 mix on it.

From your description, I definitely have the same SACD as you (minus the
"-US" bit)
Thanks for the info - at least I know the disk is correct. I also changed it
yesterday in case it was corrupted in some way, but still no luck. The
retailer has agreed today to take the player and disc for testing, so I'll
see how that goes.