The link to the Differential Equations Model Course file is missing. I have been trying to import the problem set of this course into my course.
PS: I was advised to direct this email to Mike Gage. But I do not have his email addresse.
You can review the model sets (created several years ago) by logging in as guest at
If you would like to start with these problems sets for your course, send me an email at firstname.lastname@example.org and I will send you the tgz file to import.