the correct url to your site is...
http://campmountain.bravehost.com/
(not NET on the end)

i cant find anything on the bravenet site saying that frames are not supported on the free hosting, but when it comes down to it, advertisements will be inserted into each and every webpage (frames would be a combination of 2 or more webpages at one time). given that... if an advertisement script is inserted into a frameset page, the inserted body tag before the frameset tag would probably nullify the frame setup and kill the creation of the frames. at least... that would be my guess.

end result, try opening a support ticket to get a true answer from bravenet on the ability of frames on a free hosted site.

Last time I looked Bravenet explicitly stated that frames were not supported.

There are two reasons for this.
1. Every frame gets an ad which just makes your site look like sh*t.

2. The way in which the ads are inserted means that if you are too lazy to create a noframes section nothing will display at all.

I remember Courtnie saying one time as well when posting in the forum that frames were NOT SUPPORTED with the free hosting/subdomain

so you have to upgrade your hosting if you want to use frames