Maybe it doesn't like your password? I don't use the "remember me" feature. I have a formula that helps me always remember all my passwords. Here's what I do:
1. Think of a phrase that is meaningful to you and use the first letter of each word.
Example: Everybody Loves Me = ELM
2.To this, add 3 or 4 or five letters from the place you are logging into.
Example: Oral Cancer Foundation = ocf
3. Add a number that is meaningful to you and doesn't change.
Example: Age when you received your first kiss = 16
Put these all together and you have: ELMocf16

You can remember all your pws this way because the only part that changes is the middle of the pw which is the place you are going to, and the two ends are meaningful to you and easy to remember.

You could also try a different browser, restart your computer, clear the cookies, take a break and when you come back you might see something you forgot to do previously. OR maybe someone else will have a better solution.