I am using REAPER as my DAW. I took a MIDI drum file that I know works. I set it to control the DSK Acoustic Drum Kit VSTi. Other VSTi's work, but this one dosen't. There is no audio output from the VSTi. All the Levels are up.
as far as i know, with DSK Akoustic Drums you need to set up the outputs manually, as the vst doesn't assign outputs automatically like most others do.
They are pretty sucky

If your looking for a drum sampler, Shortcircuit V1 is great. its what i was using with reaper before moving to Logic. its freeware, it has something like 32 output channels, but you'll need to get your own samples as it doesn't include any. version 2 isn't as good in my opinion.