how to get custom error pages to display

[Knoppix]

.htaccess doesnt work so i put in httpd.conf

ErrorDocument 400 /error/400.html
ErrorDocument 401 /error/401.html
ErrorDocument 403 /error/403.html
ErrorDocument 404 /error/404.html
ErrorDocument 405 /error/405.html
ErrorDocument 408 /error/408.html
ErrorDocument 410 /error/410.html
ErrorDocument 411 /error/411.html
ErrorDocument 412 /error/412.html
ErrorDocument 413 /error/413.html
ErrorDocument 414 /error/414.html
ErrorDocument 415 /error/415.html
ErrorDocument 500 /error/500.html
ErrorDocument 501 /error/501.html
ErrorDocument 502 /error/502.html
ErrorDocument 503 /error/503.html
ErrorDocument 506 /error/506.html

when i goto my web browser and type in a eg hoxo.webhop.org/dfgrfgh
it just redirects me to the web browser error page not the web site error page any ideas