I am uploading to a new host for the first time and getting an error
message:

-----------
Server Error in '/' Application
Runtime Error
Description: An application error occurred on the server. The current custom
error settings for this application prevent the details of the application
error from being viewed remotely (for security reasons). It could, however,
be viewed by browsers running on the local server machine.

---------

I've gotten this before, and followed the instructions to: "Details: To
enable the details of this specific error message to be viewable on remote
machines, please create a <customErrors> tag within a "web.config"
configuration file located in the root directory of the current web
application. This <customErrors> tag should then have its "mode" attribute
set to "Off"."

But this doesn't work...I still get the same error.