I recently purchased and set up a Obi110 using a voip provider. That part works great. the problem is, is that when I connect the landline to the line port, and a call comes in on the landline, the phone does not ring. All 3 green lights are on on the front of the 110, and yes the ringer is turned on on the phone. Any help with this is much appreciated. Also the phone is a Panasonic cordless 3 handset. Thanks.