When you first open LMMS there are tracks already set up in Song Editor. Triple Oscillator is already there on the top track. I can get the kick in your VST to work (LMMS 1.20 rc5, Win7) but it's a multi-output VST and I don't think those are supported in LMMS (or if they are I don't know how to get...
When you say "installed" do you mean opened a track with Vestige and loaded a VSTi into it? What VSTi was it?
Do the internal instruments like TripleOscillator make sounds o.k.?
Steve