BHG481 is propably hitting the nail on the head. The passwords are case sensitive, and can be a nightmare to tell the difference between lowercase l and 1, and many more examples. You can change password on router, but you need to connect it to a computer or access it via a mobile phone, and its a bit bewildering for the layman.. If you do need to change password, I can give you the info, but you will need the details from the bottom of the router, its usually ADMIN and PASSWORD, unless someone has already changed router settings.