For those of you who are silly enough to want to rename a computer that is running sql reporting services 2000, you'll quickly find that SRS doesn't like it.  Try searching all files for your old computer name in the sql reporting services installation directory.  There are a couple of config files that hold your server name.   Once it's fixed in there it should run again.  Of course I would never do such a silly thing.  I just figured it out for fun and thought I'd share.