What`s wrong with this mix ?

[Pxz]

Im loosing my head here, what would you change to this mix?

http://www.soundclick.com/util/getplayer.m3u?id=9230142&q=hi

I muted the vocals so you can focus on the instruments , i feel like something is lacking on here but i need fresh ears.

 

[metalfanat1c]

Guitars need to come up in the mix a bit. The center guitar especially.