Hi,
I'm having truble with my site. I click the thing on my accont that says my website address but it just says server.com. Can you please help me.

That isn't a Bravenet hosted site nor is it an html issue. You need to resolve this direct with your service provider.

I wonder if it isn't simply a "remembering my URL" problem.

The URL is supposed to be:
www.server.com/brokenyouth777.html

Well, according to server.com:
Launched in 1996, Server.com is one of the Internet's first and largest ASPs. We provide a suite of web-based applications for over 20,000 individuals and organizations.

So how likely is it, if you join to become customer 20001, that they will say:
"We don't bother with domains, subdomains, directories or boring stuff like that. Just upload your pages to our main directory, and make sure the filename isn't already used by someone else?"

I would rather believe that the URL is www.whatever.server.com/brokenyouth777.html or www.server.com/whatever/brokenyouth777.html