Help w/email

I was wondering if anyone one could help me. When I get on my computer and log into my yahoo account it wont let me do anything. For instance, I have auto complete so when I start to type in an email address normally several pop up and I can pick the one I want. Well, its not letting me do that or reply to messages. Also on the bottom left side where I should have my E (for explore) is says done but with errors on page. I have done everything I can possibly think of, and nothing works. Any suggestions?? Melissa