Try logging in using your "Display Name", and the same password. The old version of the software allowed users to create two different names; one was a login name and the other was a display name. The new system does not allow this. We had to decide which one to use as a login and since most people's display name and user name were the same we went with display name.
if you're still having problems, email roger@lsamechanic.com or tim@azctflyer.com for help