z3ta+ issue in Platinum

I bought z3ta+ from rgc when it was first released.  I subsequently set up Fr4ncesco's Virus MOD.  I used all three versions - the DXi, the VST, and the Virus mod - in all versions of Sonar up and through X3.  They are all still present in X3 (two VSTs - original and virus mod, plus the DXi), but in Platinum 32-bit the only VST that shows up is the virus mod.  Any idea how I can get all three working in Platinum?