<p>I am not sure where this goes, I just registered on NCSA "Prospective students" page, and requested a brochure, but now when I try to log back in, it says my PIN # is invalid, and I have tried everything, retyping it, turning caps lock on and off, and copying and pasting it from another source. I can't figure it out and it is really frustrating. So could anyone help me??</p>