Dude! Substation and Obsession are meant to be STE only! How do they run on the TT? It doesn't have a Blitter chip!! I have tried my copy of Subs (works on my STE only, not on my STF or Mega2) on my TT (German TOS 3.06) and it fails miserably - perhaps 24bit is the answer? Would that work with Robinsons Requiem you think?
BTW - A lot of programs Don't like MagiC - Cubase and Calamus spring to mind. Always try booting clean before loading old ST programs.