Offer a teeny bit of fresh creep in a clean bowl a couple of times a day. Chuck out what she hasn't eaten; if she's not eating fresh she won't eat stale.
She will eat it soon - mine usually start to fiddle on with it at about 2-3 weeks, but aren't really eating it properly for about another week to 10 days.
Once she does eat a bit of it, you can 'encourage' her to eat more by cutting out a bottle, or extending the time between bottles. Hunger is a good incentive

Oh - the other thing I have found is that Champion Tup Mix is more appealing than most creep feeds initially. So I get them on eating 'creep' using CTM, then (if necessary - some I just keep on CTM throughout) mix in the creep I really want them to have once they are eating CTM well, and gradually phase out the CTM.