Hi sara,
After you set up your static IP, did you set up port forwarding through your modem? The static IP is just the first step, so that port forwarding can work.

It all seems like a PITA but once you get it working, you won't look back. I had heaps of grief with mine, simply coz I forgot to press 'apply' after one of the steps!!

Once you get your port forwarding set up, then you can set LW to manual port forward within your tools > options etc.

Good luck