Metallurgy Multi-effect - works in X1 but misfires in X2

Metallurgy is a multi-effect VST that includes a gate effect.  I have an old project I'm working on again that was fine in X1, but when loading in X2 it only plays the first split second of the track that uses Metallurgy, and then no more sound comes from that track.  If I play to it with my MIDI keyboard it works fine - just won't play the recorded MIDI notes in the track.  If I turn the gate off, the other elements of the VST (filters, delay, etc.) work fine.  None of the presets that have the gate turned on will work in X2.  However, all work fine in X1.  Any suggestions?