Unblocking port on RH

Can anyone tell me how to unblock a port i have filtered in iptables?

Ive tried the command

./iptables -A INPUT -p TCP --dport xx -j ACCEPT

but that doesnt work.

Thanks in advance

r3b007

Why not just use the delete option and remove the rule that is blocking said port...

use the -L option to list all rules, and find the one you want to delete

then use the -D option to delete the appropriate rule.

This howto is pretty good at explaining it.

Got it sorted phish thanx.