The message "This doesn't agree with our records" keeps coming up too often. I write down what just worked and I use it again carefully. Sometimes I am as sure as I can be that what I did just now to get in is indeed what I just used and met with failure. I went to get technical help.
She helped me very much. I think the most important idea was if I know the web address, use it. No "links", just the right address.