when I open the login window, I type my login and password but it goes blank to that same window to put in my login and password. I tried it several times, over and over and it does the same thing. It doesn't give me any error window or anything like that. I cant log in from my iMac, but I tried on my Macbook Pro and I was able to log in there, but I thats my work computer and sometimes I don't have it with me. So i wanna be able to log in at home. I don't know what the problem is, can somebody help?