Why can't I log into a website?

Episode 1455 (1:41:11)

Joy from Santa Cruz, CA
Username and Password

Joy signed up for a recipe website. She can log in with one computer, but not another. It says her password is wrong. Leo says it may be that the num lock is enabled. She should see if she can type into a word processing program to make sure she has the right password, and then cut and paste it into the password field. If that works, then it may be that the site thinks it's uppercase and therefore can't accept it.