How to access config tool Cisco 836 Router from win xp/ explorer?

Hi,

I am trying to access my Cisco 836 ISDN/ADSL Router via my my browser within
Win XP.

Formerly, when i was using Win2K I had no problems, Since I upgraded to
WinXP, it doesnot work anymore?

What security settings must I change to get in?

I fill in the correct identification/password, then I do get the logon
screen from the router. I choose the language, then I get the animated
"waiting screen" and ..... nothing happens.

Who can help me??

Joseph