participant- i know what you're saying about other replying to other people's posts....it's a hard, but welcoming group to break into, as some members have a good amount of clout (for good reason).....that being said I've really just started using the mixing clinic this month (have been a member of the bbs for a while), and have been trying to give at least four or five replys for every post i do....i guess you haven't seen them....hopefully my name'll get around more the more i'm here..........
Oh. My bad

It could just be that there were a few posts of yours going at the same time. No biggy.
- what do i do to add more low mids....should that be the guitar range? or what?
Actually, the low mids comprise the body of the vox, snare, and guitar sounds. The reason it sounds like their gone in your mix, I believe, is that the guitar is just mixed a few db too loud. Since most of that guitar's energy seems to be around 1.5k, that could throw off the mix's balance if it's too loud. Also, I do believe it would help to roll off lows below at least 150Hz on vox, snare and guits and boost the fader on bass.
At that point, we could see how the balance is. Hopefully, we'll see some more low mids
EDIT: Also, consider compressing that guitar a bit, as that would smooth it out, and you could lower its fader a bit without losing it.