ToA ArtifactsFollow

alright, i have the full book for the Harpy Feather Cloak. And i have the credit for it. I'm level 41 but it says it wont let me activate the artifact. I have Catacombs and Darkness Rising. Do i need ToA installed to get it activated? Heres the thing though.. I can go into ToA islands though without ToA? Can anyone give me some info on why i cant get this damn artifact cause its makin me mad. Thanks =P