I agree with PPs that it sounds like she's just not ready yet. Keep doing what you are doing and it will come in time. My 24 mo old has no concept of pee. She knows when she has to poop and will tell us, but doesn't always go when we put her on the potty. Most of the time she plays on the potty and then poops as soon as we put her diaper back on. She will ask for a new diaper when she is heavily wet, but otherwise is unaware and not bothered by pee.
I also agree with others who have said that it seems to be easier to train when they are 100% ready. With my DS, it just happened with very little effort from me other than providing a readily accessible potty. But he was 3 yrs, 3 mos.
DS - Feb 2010
DD - May 2012