HTTP Status 401 - Unauthorized Access

HTTP Status 401 - Unauthorized Access

Hello,
I just signed up our company with Zoho CRM.  I followed the confirmation link and attempted to login to the CRM site. 
We get the following error page on two different computers running IE and Firefox.

HTTP Status 401 - Unauthorized access


type Status report

message Unauthorized access

description This request requires HTTP authentication (Unauthorized access).


Apache Tomcat/5.0.28

What do I need to do?