Trouble downloading data

I just registered on the website, logged in without a problem. But when I try to download any dataset, I'm asked to enter the login and password (why? if I'm already logged in). Okay, I enter and I get "wrong login or password". Please help.

The reason you need to login separately to download data is that the data is downloaded from a different server than the one hosting the CRCNS.org website.  There recently was a problem with the logins on the server hosting the data, but that has been fixed.  So downloading data should be working now.