Hmm a couple things I'd like to say. A lot of your melodies don't seem to be in the same key. Some don't really fit together that well.
Another thing is, for drums 'n bass the bass line isn't that very bassy at all. Nor are your drums very drummy.
All in all, it's not that I didn't like this track, I just see many ways that it could be improved.
Keep at it and I'm sure you can do better =)
its hard to make drums sound lik paragonx3's, if sum 1 could give me tips that would be awesome, the synth is lik the bass, and the key is fine untill i added that low bass in the middle, i rly liked it though