Same problem with me. I'm a DV winner 2024. but each time i'm unable to login DS260 form.My information is all correct, becouse when i try to retrieve my confirmation number, by forget confirmation number, i easily get my confirmation number using my date of birth, last name, first name and email i'd which i had entered in original DV entry form but each time i can't login to DS260 form by using my case number it's says " The case number entered is currently unavailable pleae try again later or contract the kentucky consular center."