I just started having the same issue. I can log in via the website and on my iphone and everything syncs just fine from there. But I cannot, for the past two weeks, get the app on my PC to sync. I can log in but it then tells me in order to sync I need to enter a correct password. The first time it happened I thought that I forgot my PW so I did the "forgot password". But it still doesn't work correctly. Has anyone discovered a solution yet? Thanks.