[pluggo] plugins not loading in Protools 7.4

I'm having trouble getting new plugins to load in Protools 7.4.  All the original Pluggo plugins load fine, but none of the tutorial plugins load.  I just went through the tutorials using Logic to test them and it worked fine.  According to the development guide, they should just show up as RTAS plugins.  They are in the Library/Audio/Plug-Ins/VST/Pluggo folder.  I've looked all over in Protools on mono and stereo tracks.  What am I missing?