I found the best thing to do is click on “forgot my password” under the Username/password area. Dealing with the Cache will only loop you continueousely, not sure why but it has always been a slight problem for me. Once you varify your email, you will be prompted to put in a new password and you will be back on track. Do not keep trying to re-enter your password, otherwise it will lock you out for some time… Hope this helps!