Well, it doesn't sound like reggae... more like a lukewarm sublime leftovers...
But I checked out the original, and its clear that its not your fault.
The bass is solid, I like the tone & the groove. In fact, I'd say that's the highlight. That and the Dub 101 reverb'd snare at :30-ish. I always love hearing
that snare.
Overall I suggest a little less Brad Nowell and a little more Bunny Wailer.