I am quite new to MOSS. I have created a site collection at the root of the web application and created new site named as "sites". So the URL for the newly created site reads as http://servername:3456/sites/default.aspx and this URL is accessible.
Now I have created a new site collection at the managed path "sites/" and "site1". So the URL for the newly created site collection reads as http://servername:3456/sites/site1/default.aspx and this URL is accessible too.
Now when I come back to the previous URL http://servername:3456/sites/default.aspx, it is showing as 404 Page not found. Whereas the site is available in sites library of the root site collection. Could anybody explain me the reason behind this?