Have you tried resetting your password then?
If not, try it at click here.
Also see click here under 'Resetting your password' lower down.
When you change your password (you will need to the next time you log in), make sure it's a long(ish) one, with alphanumeric & 'special' characters as well (latter if allowed) like: £ $ % ^ & * _ - + > <. G