i don't think it's that - i think the plugin just hasn't been tested well on FL. i should write the dev a letter, really.
the whole plugin is a bit wonky in FL - like, the for the included presets in ML drums, half of them load with a badly distorted kick drum. when i load the kick drums myself in my own presets, all plays fine.
i can use it fine right now if i just record the master with edison, the sampler, in FL...
i think the finnish dude who made it needs a few bug reports from FL studio users.