No changes here. I would suggest the following:
In Firefox, go to Tools > Options > Security and make sure the "Remember Passwords for Sites box is checked. Click the Saved Passwords button and search for
www.signs101.com. Delete any entry found.and close out of Options. Next go to signs101 and login making sure the "Remember Me?" check box is checked. See if a popup asks if you want Firefox to remember your password. If it does, you've probably fixed the problem.
If that doesn't do it, clear your cache and cookies and see if that fixes it.
Let us know if this helps.