Modifing Iptables

[Jim]

FC11-X86_64/Kde

Trying to setup VNC in fedora 11 but if I put the following line in 
/etc/syconfig/iptables ;

# 5901 corresponds to :1, 5902 for :2 and so on.
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5901:5902 -j ACCEPT

Then do   # service iptables restart  , it fails.

What is happening ??