I am looking into the problem. It's nothing to do with us and has been setup before. It seems to be some mechanism to stop know IPs which spambots operate from. I will need to look into it more definatively to get to the bottom of the problem. I noticed it once myself when I tried to login from a public wifi hotspot but do not get the problem when logging in from the office or home.
Are you on a static IP or dynamic?
