I'd think she doesn't drink it because she knows instinctively it's not good for her (especially if you are feeding her pasteurized milk). If you can get raw milk in your area, you might try that (www.realmilk.org ). I've also read that real goat milk is closer to human breastmilk then cow's milk (http://www.fieldstoneorganicfarm.com/educational/milk_inf... )and that can be purchased at health food stores or even at grocery stores (canned goat milk).I
f she eats yoghurt or ice cream, go ahead and let her have it, especially the full-fat versions (not non-fat products because she still needs the fats for proper brain development). Might try kefir or buttermilk too, especially at the health food stores, they might be better accepted (yoghurt especially from health food stores with live bacterial strains "probiotics" and kefir will both be good for her and help other digestion issues too.
Watch out for the cheaper "yoghurt" at grocery stores because they are usually nothing but pasteurized milk, thickeners such as guar gum, carageenan, gelatin, and all sorts of chemistry set coloring and flavorings and artificial sweeteners...no need for that!!
Might want to be careful with using soy proteins - or use it in combination with other dairy - as the soy also adds additional estrogen (phytoestrogens that fit the estrogen receptors and cause the body to respond to it as estrogen) which might cause problems. I don't have the full handle on this but the reading I've done caused me to cut way back on it myself personally.
The Almond Milk and the Hemp Milk beverages are also very tasty but they both say specifically don't use as infant formula. So you'd have to make sure she was getting again, the proper omega 3 and omega 6 fats (although Hemp milk is balanced in that regard, has those good fats in the proper ratio).
Does she eat veggies like spinach, or other greens? if so she's likely getting plenty of calcium from her greens and doesn't need to rely on the milk so much.
The other thing is if she was just weaned, she may be "on strike" - check the website for La Leche League - (my book is upstairs!) - so she may be refusing the milk just because she's mad that she's not nursing Mommy's Milk.
My son nursed for quite a while after 17 months but not exclusively, and he'd never take formula or bottle either - he was eating good at 17 months and gradually having more cow's milk from his sippy cups, but still nursing like night or before nap times etc. So just let her have yoghurt or other things she will eat and after awhile she may begin accepting more milk from other sources.