Xbox MW2 ICS settings

[#1]

I've just changed my router from a Belkin to a PlusNet supplied Thomson TG585V7.  Previously we could play MW2 with XboxLive using Internet Connection Sharing via my laptop.  Now I can connect to to Xbox Live but the game won't play as the NAT is set to strict.  I can't find out where to change the NAT settings.  Any ideas?

[#2]

Make sure upnp is enabled.

[#3]

I've checked this an it is

[#4]

In the settings on the router there should be a designated section for NAT?

[#5]

Unfortunately, I can't find it.    I was hoping that someone could tell me where to find this option

[#6]

get rid of the ics connection and bridge the lan and wireless card in the laptop settings instead. when i first got my xbox years ago this how i connected it up as ics would not allow me to NAT and portforward right.
where if the 2 network cards are bridged it works like your xbox is connected straight to the router. insure none of the network adapters are connected when you bridge, then once bridged connect to internet and make sure laptop has a connection then hook your xbox up

[#7]

thanks very much.  set-up the bridge and it works a treat!