I've configured the web.config file and uploaded all the files to our host.  All we get is a "Runtime" error page asking us to add an entry to the webconfig file so that we can see what the errors.  When we do this nothing happens.  We seem to have hit a brick wall.  Has anybody got any ideas?

That's the problem, we can't get an actual error message.  I think that we're looking to source DNN friendly hosting for the time being.

You'd never get this with Linux!!

I've tried the custom error thingy as both:

<customErrors mode="RemoteOnly"/> & <customErrors mode="off"/>

I get the below error message whatever the setting is.  In fact, if I delete the config file completely, I still get the same message.

The exact message is as follows:

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.

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".

<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
        <customErrors mode="Off"/>
    </system.web>
</configuration>

<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
        <customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
    </system.web>
</configuration>