You seem to have a newer model. I can't find specific instructions but it may be similar to another model. What you can do in the meantime is 2 very simple tests: 1. Test of Port 6346 which LW uses: http://www3.limewire.com:6346/ If it says the test page was a success then that is not too bad. 2. Test for NAT blocking: http://www.u.arizona.edu/~trw/games/nat_or_not.php And it will tell you in a grey coloured box whether you are using a NAT device or not.

You may need to wait a little whilst I can find some advice on your particular model of modem.