Your new password must contain numbers, mixed case letters, and a special character. Here are some examples:
Thiswon'twork (no number)
thiswon'twork1 (no upper case letter)
thiswontWork1 (no special character)
ThisWillWork1!
The best way to make your password work is to make sure it has upper and lower case letters and then add a 1! at the end. Please let me know if this helps.