Why is Netflix not working?

When I opened Netflix on my iPhone 4S tonight, it asked me to re-login because some things on my account had changed. No idea what that meant, but whatever. So it brings me to the standard login screen. I type in my username and password... But for some reason, it won't let me hit the login button. Pushing GO on the keyboard display also does nothing. So as of now, I simply cannot get onto Netflix. Can anyone help?

Thanks.