Please contact customer service. They can help with login problems. http://individuals.interactivebrokers.com/en/general/contact/contact.php?ib_entity=llc
DAV: I don't like to call the Hong Kong office for paper trading log-in problems on Sundays (US office is not open and you get a redirect to HK or Europe depending on the time of day here in the US)). I find HK very helpful but don't like to bother them for non-essential stuff like paper trading. ET is often a good way to verify that it is an IB problem and not my problem. As you may have noted the problem cleared within about twenty minutes. I assume the problem was with the paper trading server as I was able to log into my "real" account with no problem. Jack