Custom Error Pages On IIS6

My site is hosted on a friends server, which is in his office on a 24MB Business ADSL connection, and is running Server 2003 Enterprise.

I thought i'd try and set up custom error pages for my site last night, but for whatever reason, I can't get them working.

I did a test page with random text, and named it 404.htm.

I then did a file with the following in:

<Files .htaccess>
order allow,deny
deny from all
</Files>
ErrorDocument 404 /404.htm

I then renamed the file to .htaccess after uploading both of the files.

However, when I tried entering a non existant page url, the normal IIS 'page cannot be found' error came up.

In addition, the .htaccess file was still visible when I connected via ftp again.

Now I think of it, I can understand the file not ending up invisible, since files with a . in front are most commonly used on *nix OS's.

However, that wouldn't explain the error page not working.

Is there something I need to get the person who owns the server to do to get it working, or am I doing it completely the wrong way for a Windows machine?

should have done a search before posting really.....I was doing it the wrong way, and I will need to get him to do it, as it needs setting up in the IIS config.