Port forward does not work with windows 2003

Yo.

I have a big problem. I have installed apache on w2k3 and it is
working. I can view page on every computer that is placed in internal
network. I have gateway on Debian. My rule for forward in iptables is:

iptables -t nat -A PREROUTING -p tcp -d 193.193.0.66 --dport 80 -j DNAT
--to 192.168.1.199:80
iptables -A FORWARD -d 192.168.1.199 -j ACCEPT

This rule work when i forward port to a computer where is installed
windows other that windows 2003. On windows XP/2000 port forward works
well, but on windows 2003 it's not working.

By "not working" i mean that when you are on a computer that is outside
of internal network the page doesn't apear in web browser. The same is
with ftp, sftp and other ports.

But on freesco forward works to this windows 2003. And that's what is
the most strange.

Please HELP