Eh? Not sure why. Are you sure you typed in the whole URL? Like, if khttpd_port (which must be in the [hijack] section of config.ini) is set to 8080, the URL would look like:

http://xxx.xxx.xxx.xxx:8080/

The http:// part is required... If you did all that and it's still not working, I'm stumped, because it works for me.