A username and password are being requested by http://192.168.1.1. The site

A user-name and password are being requested by http://192.168.1.1. The site says: “Before configuring the Gateway, a User Name / Password is required. If you do not know the User Name / Password please refer to the User manual for fu?”

My Question is how do I access my ISP’s Gateway when W7 authentication blocks me. The Authentication required Dialog Box appears and I enter my user name & password that I setup when I was using WXP SP3, now this W7 feature dialog box blocks me?