I did a little poking around and here's what I think is happening.
www.s-fix.no-ip.biz won't work because that's not your address, s-fix.no-ip.biz is. So http://s-fix.no-ip.biz
would point to your site.
Looking at the DNS info on s-fix.no-ip.biz
, the IP address is recorded as being 192.168.0.136. I'm not a networking expert, but I believe IP addresses beginning with 192.168 are reserved for local networks, i.e. networks behind a router like most home and business setups. If I surmise correctly, you entered this IP in your no-ip.biz setup. Make sure, rather, that you give them you external
address, which you can discover by visiting http://whatsmyip.org/
Once you've done that, it's simply a matter of forwarding ports as groovicus said earlier.
I'm not sure how no-ip.biz works but the above is how I set up my own webserver with http://www.dyndns.com/
for free. See: http://andrew.doesntexist.org