The following file(s) have been blocked by the administrator.

Situation: You try to load a .asp file or some other file type other than .aspx and sharepoint refuses to let you view it. Whether or not the server can interpret asp code is a different matter altogether.

Cause: By default, there is a long list of file extension types that are blocked by sharepoint.

Solution: Go to Sharepoint Central Administration, log in as administrator, scroll down to Security Configuration, click Manage blocked file types, delete the file types that you don't want to block and then click ok.