Did you set up a static ip ok?

Is your modem connected via ethernet or USB? There may be a chance your modem doesn't require port forwarding since I couldn't find specific instructions for your particular model but most motorolla modem's do. These might not be accurate enough instructions.

Try opening LW again & let it run for about an hour to see if it connects. If yes, do this test for us: Bug Report instructions & sample image & see if it's true/false.