http://www.yousendit.com/download/RmNEeEVkRkVUWUJFQlE9PQ
More homework:
This is Evanescense' "It Was All a Lie". It's very close to your work, and there are some things to learn from it, applicable to your project and problems. Download and A/B the recordings.
I did, a few times, and here's what I learned:
1-there's a big , round poofy bottom end in the bass range of your recording, and it's overwhelming the mix...and tending to bury the vocal some.....to a lesser degree with the EQ of the guitar R, IIRC. Watch the graph bars in the player to see it. In your record, the spikes of the vox are generally even or beneath the bulge in the bass range. The Evanescense recording has the vox standing tall above the whole mix....which is very flat...rolling off toward the high end only about 3db....hot.
2-the vocal on the Evanescense record is EQ'd to give it a lot more gloss in the high end...and the use of stereo delay has the voice bouncing off the walls L&R to help the thinness and low place in the mix overwhelm the backing. It is the space-defining sound.
3-The vox on Evanesence is much stronger, and more even...compressed, and volume-envelope-tweaked to make sure every syllable and "T" and "S" and click and breath it evenly represented...making it easier to understand.
4-note the use of doubling and volume push in the EV vocal, to accent chorus...compete with bigger parts.
5-In your record, there are places where the Guit R steps on the vox. Edit some of the backing to feature the vocal at all times...or compliment it.
You may want to have the singer listen.....the flow, strength and poetry of the lyric. The cock-sure delivery. She sings kinda Nora Jones 'breathy' at times. It might be able to be enveloped to compete with the aggressive backing; but , generally, might be better sung with more vocal chords and/ or doubling.
That's my advice. Listen to this work, and see what else you can grab from it. This crew knows how to do what you want to do...among the best I've heard!