Spinning Icon when trying to play anything

I got my WDTV Live Hub today and I was able to play a video or two (not sure of the format or anything).  I then tried to get the device to “see” the videos on my NAS.

Although the device “sees” the NAS and its contents, nothing will play.  When I try any of the internal or NAS-hosted videos, I just get the spinning icon.

Is this because the device is “scanning” the NAS for videos to put in the library?  I will not even play the “sample videos” that were included on the device.

What version of Samba is your NAS running?

SAMBA version? Dunno.

Its whatever the DNS-321 is running.  Its on Firmware 1.03.  What should I look for? Should NFS be active?