Hi mattucf,
You didn't mention which OBi you are using. If you are referring to the OBi202, there is another thread on this forum in which Obihai says it is a problem they are working on. You may also want to make sure you are using the latest, most current version of OBi firmware. You can check that by using the telephone attached to your OBi and pressing ***6.
Hope it helps,
pc44