Try doing a factory reset by pushing a paperclip or similar in the router factory reset hole. Keep the switched closed for 30 seconds then leave it alone for a bit to see if it sorts itself out.
Re: Broadband won't login
Baldrick1, I had left this as a last resort as I didn't think it would solve it. But hats off, it has. All credit to you! God knows what happened.
My problem now is, I can't log in to the router. Either on the password I had previously set or the one on the back of the router.
Anyone else had this or have those nasty PlusNet people done something remotely?