Packet forwarding for Battle.net port 4000 6112-6119

This is current setting

internet -- linux -- AP -- host 10.1.1.52
(which i'm configuring)

iptables -t nat -A POSTROUTING -s 10.1.1.0/24 -o eth0 -j MASQUERADE
iptables -A FORWARD -s 10.1.1.0/24 -o eth0 -j ACCEPT
iptables -A FORWARD -d 10.1.1.0/24 -m state --state ESTABLISHED,RELATED -i eth0
-j ACCEPT

openning port 59527 for bittorrent on host 10.1.1.52

iptables -t nat -A PREROUTING -p tcp --dport 59527 -j DNAT --to-destination 10.1
..1.52
iptables -A FORWARD -s 10.1.1.52 -p tcp --dport 59527 -j ACCEPT

problem lines

iptables -t nat -A PREROUTING -p tcp --dport 4000 -j DNAT --to-destination
10.1.1.52
iptables -t nat -A PREROUTING -p tcp --dport 6112:6119 -j DNAT
--to-destination 10.1.1.52
iptables -A FORWARD -s 10.1.1.52 -p tcp --dport 4000 -j ACCEPT
iptables -A FORWARD -s 10.1.1.52 -p tcp --dport 6112:6119 -j ACCEPT

everytime i tried to connect battle.net with warcraft III it hangs
Can anyone figure out why from commends above?