Facebook to post trouble shooting

FBomatic stopped working on my sites and can't get it back on track. Is the new cookie method optional? I watched your video on how to set it up but if I have to create a separate facebook account and not log out of it, does it mean that I wont be able to use my own facebook account any more? I hope we can resolve this as I really find this plugin helpful and use it on two client sites already Thanks in advance