I couldn't find specific instructions for your model but the others listed on the follwoing page wilol probably be almost identical. Perhaps try the 3com 3C857 Port Forward instructions (top left column for 3com) & also see the link for creating a static ip which you'll need to forward a port properly otherwise this no. will always change each time you connect to the net/restart the comp. Just click on the model name in brown text & on the following page select Port Forwarding instructions.

After this you will need to force ip within LW: Force IP instructions & sample image which will be the easiest part.

If you're using Windows update your Java: Java 1.4.2 (click on link) (though I have a suspicion you use a mac right?)

Here's some hints for optimising LW: A well set-up LW can start to automatically continue its dwnlding after it's settled down perhaps 2 out of 3 times you open LW. Optimising LW & Maximising Uplds & Dwnlds A (1st post only) & also Part B which is even better & last & least are search & dwnld hints. Good luck!