How do I convince my 22 month old daughter to pee in the potty?

I first started putting her on the potty at 18 months and the 1st time she pee'd I was so excited but she hasn't done it since then. I was afraid that maybe she just wasn't old enough to understand what she had done so I decided to wait til she had the signs that she was ready to potty train. Now she tells me that she has pee'd she will tell me she needs a diaper so we started potty training again. She loves to sit on the potty she will tell me she has to potty but eveytime we go in there she will sit there and do nothing then say that she's done and want to wipe and flush. And the worse part is she will pee right after I put her diaper back on. I even got to where I'm telling her she can only wipe and flush if she puts some pee pee in the potty but that still doesn't work either. So I'm not sure what to do to convince her to pee?