I use the same isp, account no and password at home without any problems there!
Perhaps it could be my Internet Explorer 5.5 at the office?
I have been advised to get a LJ10/14 filter thingy by a guy having similar problems in Brookmans Avenue.
I will let you know the result when I have bought one.
I am very reluctant to change isp as every time you change, there is always loaded of problems inc. e-mail addreses etc - too much hassle.
I will try plugging into another line - good idea.
Thanks for all your ideas.