Can No Longer Create 404 Pages

[jpb6891]

I can no longer create my own 404 pages. I get a default 404 page. Can this be fixed?

[descalzo]

Create 404 page. Name it 404.html ( .shtml no longer works ).
Open .htaccess in public_html
Add

ErrorDocument 404 /404.html

Note the / before the file name.
Personally, I put my error docs in their own directory, error and use the line

ErrorDocument 404 /error/404.html