Unable to Log In to Applicant Portal?

<p>I got sent the information to log into the Penn Applicant Portal in the mail, but when I typed in the login URL, it said the page was a bad request or something and I was unable to open it. I've tried several different times over quite a long period of time, and it still didn't work.</p>

<p>I then tried using the direct link from the Penn Admissions site but it then said that my username was invalid. I emailed them at the address they said to use if I had problems, but it's been a few weeks and they still haven't replied.</p>

<p>Has anyone else had this problem?/Any advice?</p>

<p>Thanks.</p>