unable to install tomcat

Hello friends,

I installed tomact5.5 server and when I am giving the path in url as http://localhost:8080, it is asking username password when I gave the name it displaying unauthorized I tried with all I remember but unable to get. I uninstall and install the jdk and tomcat again but getting the same error again.

Please help me.

[351 byte] By [23Bhavi11a] at [2007-11-27 10:33:03]