[dba-SQLServer] Reporting Services issue

I just installed SQL 2008 Feb CTP. From the Reporting Services Configuration
thing, I can test the connection and it works fine. What I see from there
is:

Server name: EXCALIBUR
Report Server Instance: MSSQLSERVER
Report Manager URL: http://EXCALIBUR:80/Reports

When I test the connection from there, it works fine (with or without the
":80" since that's the default port).

However, when I try to run Report Manager, using the default URL (same as
above, with or without the ":80), I get "The page cannot be found."

Just to make sure everything else was ok, I ran DreamWeaver and loaded a
project I've been working on, and successfully ran it without a problem (i.e.
http://localhost/cafe_townsend/index.html).

Any suggestions?

TIA,
Arthur