Before you try the direct connection to the modem, first try to power down the OBi110, then your Router and finally your Modem. I would disconnect any other devices from your Router. Power up your Modem and let it sync. Then Power your Router. Wait a minute or two and then connect/power up the OBi110 only. The OBi110 should be the only device connected to your Router/Network. Test. If that doesn't work, then you can try the direct connection to your Modem and remember to power cycle the Modem after connecting the OBi110!