I have a Tyan S2865 Opteron motherboard running Trixbox SMP kernel. It has 2 A1200 cards and a D-210P - Asterisk 1.2.17 + Zaptel 1.2.16 compiled from source.
I rebuilt zaptel several times, and tried moving cards around, but could not get any voice playback on the system. genzaptelconf worked fine and detected every card and port, but no voice. When I finally removed the D210 it immediately worked perfect.