This not dubstep.
Put this in miscellaneous. Maybe send it to animusic or something. This is not all that great.
I think you did a pretty good job with this piece, but there isn't much going on with it... You need a few more effects in there and a change in the beat would be pretty good too, maybe just up the tempo in a few parts, you know, to keep it from getting stale. But other than that it was pretty good I thought. Keep up the good work! : )