Thank you for your post, and the opportunity to assist!
I've finished out the summer section. You should now be able to sign into the Fall section, with your existing account, and your access will continue.
Please let me know if you need anything else. Have a great day!
I have the same problem. I'm still in the 2015 course, but I need to register for PH1100: Physics I & II, Physics KIRK FARRELL, ED SMITH Fall 2016.