I am new in Sharepoint, but I am with a project that is using MOSS 2007.
When I try to access
Gallery > Master Page it redirects to
The problem is that
http://myservername/_catalogs/masterpage/ is returning 404 code, page not found.
But if I create a site collection called "somesite" and access
http://myservername/sistes/somesite/_catalogs/masterpage/ is working fine.
I first thought it could be some problem with the master page, but if it was true it would return an error message instead of not finding the URL.