Im trying to migrate pokemon from leaf green to platinum and diamond but they keep saying try again?

every time i try it saying that it need to change the time on my ds and it does it and says wait 24 hours on both games. so i waited 24 hours and tryed it again but it said the same thing even though i didnt mess with the time on my ds. so i have to wait another 24 hours. can someone tell me whats going on?