I haven't had that problem (yet), although it did take about a week for the site to recognize the initial password that they issued me...have you already tried to do the section? When you go into the section under the login info there's sometimes a record of what you've already saved...
If it makes you feel better, I can't quite figure out how to, um, submit my application.
UMass! I know, you don't officially submit it, but I've saved and added and done all of the sections, but it all still appears on the "Things To Do" section as sections undone, and nothing is graying out....